module top_module (
    input clk,
    input reset,
    input in,
    output disc,
    output flag,
    output err
);

    // State definitions
    typedef enum logic [2:0] {
        S0, // Reset state
        S1, // 0
        S2, // 01
        S3, // 011
        S4, // 0111
        S5, // 01111
        S6, // 011111
        S7, // 0111111
        S8  // 01111111 (Error state)
    } state_t;

    state_t state, next_state;

    // Output logic
    always_ff @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

    // Next state logic
    always_comb begin
        // Default assignments
        next_state = state;

        disc = 0;
        flag = 0;
        err = 0;

        case (state)
            S0: begin
                if (in)
                    next_state = S1;
            end

            S1: begin
                if (in)
                    next_state = S2;
                else
                    next_state = S0;
            end

            S2: begin
                if (in)
                    next_state = S3;
                else
                    next_state = S0;
            end

            S3: begin
                if (in)
                    next_state = S4;
                else
                    next_state = S0;
            end

            S4: begin
                if (in)
                    next_state = S5;
                else
                    next_state = S0;
            end

            S5: begin
                if (in)
                    next_state = S6;
                else
                    next_state = S0;
            end

            S6: begin
                if (in)
                    next_state = S7;
                else
                    next_state = S0;
            end

            S7: begin
                if (in)
                    next_state = S8;
                else begin
                    next_state = S0;
                    flag = 1; // Detected 01111110
                end
            end

            S8: begin
                next_state = S8;
                err = 1; // Detected 01111111 (error)
                if (!in) // Go back to reset
                    next_state = S0;
            end
        endcase
    end

    // Output assignments
    always_ff @(posedge clk) begin
        if (state == S6 && in == 0)
            disc <= 1; // Detected the pattern 0111110
        else
            disc <= 0;
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    typedef enum logic [2:0] {
        IDLE = 3'b000,
        S1 = 3'b001,
        S11 = 3'b010,
        S111 = 3'b011,
        S1111 = 3'b100,
        S11111 = 3'b101,
        S111110 = 3'b110,
        S111111 = 3'b111
    } state_t;

    state_t state, next_state;

    always_ff @(posedge clk) begin
        if (reset) begin
            state <= IDLE;
        end else begin
            state <= next_state;
        end
    end

    always_comb begin
        // Default outputs
        disc = 0;
        flag = 0;
        err = 0;
        next_state = state;

        case (state)
            IDLE: begin
                if (in == 1) next_state = S1;
            end
            S1: begin
                if (in == 1) next_state = S11;
                else next_state = IDLE;
            end
            S11: begin
                if (in == 1) next_state = S111;
                else next_state = IDLE;
            end
            S111: begin
                if (in == 1) next_state = S1111;
                else next_state = IDLE;
            end
            S1111: begin
                if (in == 1) next_state = S11111;
                else next_state = IDLE;
            end
            S11111: begin
                if (in == 1) next_state = S111111;
                else next_state = S111110;
            end
            S111110: begin
                if (in == 1) next_state = S1;
                else next_state = IDLE;
                disc = 1;
            end
            S111111: begin
                if (in == 1) begin
                    next_state = S111111;
                    err = 1;
                end
                else begin
                    next_state = IDLE;
                    flag = 1;
                end
            end
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // Define states
    typedef enum logic [2:0] {
        STATE_0 = 3'd0, // Initial state
        STATE_1 = 3'd1,
        STATE_2 = 3'd2,
        STATE_3 = 3'd3,
        STATE_4 = 3'd4,
        STATE_5 = 3'd5,
        STATE_6 = 3'd6,
        STATE_7 = 3'd7 // Error state for 7 or more consecutive 1s
    } state_t;

    state_t current_state, next_state;
    reg [2:0] ones_count; // To count consecutive 1s

    // State transition logic
    always_ff @(posedge clk or posedge reset) begin
        if (reset)
            current_state <= STATE_0;
        else
            current_state <= next_state;
    end

    // Next state logic and output logic
    always_comb begin
        // Default assignments
        disc = 0;
        flag = 0;
        err = 0;
        next_state = current_state;

        case (current_state)
            STATE_0: begin
                if (in)
                    next_state = STATE_1;
            end
            STATE_1: begin
                if (in)
                    next_state = STATE_2;
                else
                    next_state = STATE_0;
            end
            STATE_2: begin
                if (in)
                    next_state = STATE_3;
                else
                    next_state = STATE_0;
            end
            STATE_3: begin
                if (in)
                    next_state = STATE_4;
                else
                    next_state = STATE_0;
            end
            STATE_4: begin
                if (in)
                    next_state = STATE_5;
                else
                    next_state = STATE_0;
            end
            STATE_5: begin
                if (in)
                    next_state = STATE_6;
                else
                    next_state = STATE_0;
            end
            STATE_6: begin
                if (in) begin
                    next_state = STATE_7; // Go to error state
                    err = 1;
                end else begin
                    next_state = STATE_0;
                    flag = 1; // Flag condition for "01111110"
                end
            end
            STATE_7: begin
                err = 1; // Stay in error state
                // Can stay here indefinitely or reset naturally on reset signal
                // In a realistic scenario, you might have different handling here
            end
        endcase
    end

    // Detect bit to be discarded
    always_ff @(posedge clk or posedge reset) begin
        if (reset) begin
            ones_count <= 3'd0;
        end else if (current_state == STATE_5 && in) begin
            disc <= 1; // Bit 0 following five 1s should be discarded
        end else begin
            disc <= 0;
        end
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum logic [3:0] {
        S0, S1, S2, S3, S4, S5, S6, S7
    } state_t;

    state_t state, next_state;

    // State register logic
    always_ff @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

    // Next state logic and outputs
    always_comb begin
        // Default outputs
        disc = 1'b0;
        flag = 1'b0;
        err = 1'b0;

        case (state)
            S0: begin
                next_state = in ? S1 : S0;
            end
            S1: begin
                next_state = in ? S2 : S0;
            end
            S2: begin
                next_state = in ? S3 : S0;
            end
            S3: begin
                next_state = in ? S4 : S0;
            end
            S4: begin
                next_state = in ? S5 : S0;
            end
            S5: begin
                if (in)
                    next_state = S6;
                else begin
                    disc = 1'b1; // Indicate a bit discard
                    next_state = S0;
                end
            end
            S6: begin
                if (in) begin
                    err = 1'b1; // Indicate an error
                    next_state = S7;
                end else begin
                    flag = 1'b1; // Indicate a flag
                    next_state = S0;
                end
            end
            S7: begin
                if (in)
                    next_state = S7;
                else
                    next_state = S0;
            end
            default: next_state = S0;
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    typedef enum logic [2:0] {
        S0, // Initial state, assumes previous input as 0
        S1, // Saw '0'
        S2, // Saw '01'
        S3, // Saw '011'
        S4, // Saw '0111'
        S5, // Saw '01111'
        S6, // Saw '011111'
        S7, // Saw '0111111', indicates potential error
        S8  // Saw '01111110', indicates flag
    } state_t;

    state_t state, next_state;

    always_ff @(posedge clk) begin
        if (reset) begin
            state <= S0;
        end else begin
            state <= next_state;
        end
    end

    always_comb begin
        // Default outputs
        disc = 0;
        flag = 0;
        err  = 0;

        case (state)
            S0: begin
                if (in) next_state = S1;
                else    next_state = S0;
            end
            S1: begin
                if (in) next_state = S2;
                else    next_state = S0;
            end
            S2: begin
                if (in) next_state = S3;
                else    next_state = S0;
            end
            S3: begin
                if (in) next_state = S4;
                else    next_state = S0;
            end
            S4: begin
                if (in) next_state = S5;
                else    next_state = S0;
            end
            S5: begin
                if (in) next_state = S6;
                else    next_state = S0;
            end
            S6: begin
                if (in) begin
                    next_state = S7;
                end else begin
                    next_state = S8;
                end
            end
            S7: begin
                if (in) begin
                    next_state = S7;
                    err = 1; // Error detected
                end else begin
                    next_state = S0;
                    disc = 1; // Discard zero after 5 consecutive 1s
                end
            end
            S8: begin
                flag = 1; // Indicate flag detection
                if (in)   next_state = S1; // Started with 1
                else      next_state = S0; // Started with 0
            end
            default: next_state = S0;
        endcase
    end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output reg disc,
	output reg flag,
	output reg err);

    // Define state encoding
    typedef enum logic [2:0] {
        S0, // Start state, after reset or seeing 0
        S1, // Seen 1
        S2, // Seen 11
        S3, // Seen 111
        S4, // Seen 1111
        S5, // Seen 11111
        S6, // Seen 111110
        S7, // Seen 111111 (error state hereafter)
        S8  // Seen 1111110 (flag state)
    } state_t;

    state_t current_state, next_state;

    // State transition and output logic using combinational logic
    always_comb begin
        // Default output values
        disc = 0;
        flag = 0;
        err = 0;

        case (current_state)
            S0: begin
                if (in) next_state = S1;
                else next_state = S0;
            end
            S1: begin
                if (in) next_state = S2;
                else next_state = S0;
            end
            S2: begin
                if (in) next_state = S3;
                else next_state = S0;
            end
            S3: begin
                if (in) next_state = S4;
                else next_state = S0;
            end
            S4: begin
                if (in) next_state = S5;
                else next_state = S0;
            end
            S5: begin
                if (in) next_state = S6;
                else begin
                    next_state = S0;
                    disc = 1;
                end
            end
            S6: begin
                if (in) next_state = S7;
                else begin
                    next_state = S8;
                    flag = 1;
                end
            end
            S7: begin
                if (in) begin
                    next_state = S7;
                    err = 1;
                end else begin
                    next_state = S0;
                    flag = 1;
                end
            end
            S8: begin
                if (in) next_state = S1;
                else next_state = S0;
            end
            default: next_state = S0;
        endcase
    end

    // Sequential logic for state transitions
    always_ff @(posedge clk) begin
        if (reset) current_state <= S0;
        else current_state <= next_state;
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output disc,
    output flag,
    output err);

    // State enumeration
    typedef enum reg [2:0] {
        S0, // Initial state
        S1, // First 1
        S2, // Second 1
        S3, // Third 1
        S4, // Fourth 1
        S5, // Fifth 1
        S6, // Sixth 1
        S7, // Seventh 1 (Error state)
        SD  // Discard state
    } state_t;

    state_t state, next_state;

    // Output logic
    assign disc = (state == SD);
    assign flag = (state == S6 && in == 1'b0);
    assign err = (state == S7);

    // State transition logic (combinational)
    always @(*) begin
        case (state)
            S0: next_state = (in == 1'b1) ? S1 : S0;
            S1: next_state = (in == 1'b1) ? S2 : S0;
            S2: next_state = (in == 1'b1) ? S3 : S0;
            S3: next_state = (in == 1'b1) ? S4 : S0;
            S4: next_state = (in == 1'b1) ? S5 : S0;
            S5: next_state = (in == 1'b1) ? S6 : SD;
            S6: next_state = (in == 1'b1) ? S7 : S0;
            S7: next_state = (in == 1'b1) ? S7 : S0;
            SD: next_state = (in == 1'b1) ? S1 : S0;
            default: next_state = S0;
        endcase
    end

    // State flip-flops (sequential)
    always @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    typedef enum logic [2:0] {
        S0 = 3'b000, // Initial state, assume the previous bit is 0
        S1 = 3'b001, // Seen one '1'
        S2 = 3'b010, // Seen two '1's
        S3 = 3'b011, // Seen three '1's
        S4 = 3'b100, // Seen four '1's
        S5 = 3'b101, // Seen five '1's
        S6 = 3'b110, // Seen six '1's
        S7 = 3'b111  // Error state for seven or more '1's
    } state_t;

    state_t current_state, next_state;

    always @(posedge clk) begin
        if (reset)
            current_state <= S0;
        else
            current_state <= next_state;
    end

    always @(*) begin
        // Default output values
        disc = 1'b0;
        flag = 1'b0;
        err  = 1'b0;

        case (current_state)
            S0: begin
                if (in)
                    next_state = S1;
                else
                    next_state = S0;
            end
            S1: begin
                if (in)
                    next_state = S2;
                else
                    next_state = S0;
            end
            S2: begin
                if (in)
                    next_state = S3;
                else
                    next_state = S0;
            end
            S3: begin
                if (in)
                    next_state = S4;
                else
                    next_state = S0;
            end
            S4: begin
                if (in)
                    next_state = S5;
                else
                    next_state = S0;
            end
            S5: begin
                if (in)
                    next_state = S6;
                else
                    next_state = S0;
            end
            S6: begin
                if (in)
                    next_state = S7;
                else begin
                    next_state = S0;
                    flag = 1'b1;
                end
            end
            S7: begin
                if (in)
                    next_state = S7; // Remain in error state
                else
                    next_state = S0;
                err = 1'b1;
            end
            default: begin
                next_state = S0;
            end
        endcase

        // Disc should be set only when moving from S5 to S6 on incoming '0'
        if (current_state == S5 && ~in)
            disc = 1'b1;
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum reg [2:0] {
        S0, // State with 0 or not enough 1s
        S1, // 1 consecutive '1'
        S2, // 2 consecutive '1's
        S3, // 3 consecutive '1's
        S4, // 4 consecutive '1's
        S5, // 5 consecutive '1's
        S6, // 6 consecutive '1's (flag detection)
        S7  // 7 or more consecutive '1's (error)
    } state_t;

    state_t current_state, next_state;

    // State transition logic
    always @(posedge clk) begin
        if (reset) begin
            current_state <= S0;
        end else begin
            current_state <= next_state;
        end
    end

    // Next state logic
    always @(*) begin
        case (current_state)
            S0: next_state = in ? S1 : S0;
            S1: next_state = in ? S2 : S0;
            S2: next_state = in ? S3 : S0;
            S3: next_state = in ? S4 : S0;
            S4: next_state = in ? S5 : S0;
            S5: next_state = in ? S6 : S0;
            S6: next_state = in ? S7 : S0;
            S7: next_state = in ? S7 : S0;
            default: next_state = S0;
        endcase
    end

    // Output logic based on the state transition
    always @(posedge clk) begin
        if (reset) begin
            disc <= 0;
            flag <= 0;
            err <= 0;
        end else begin
            disc <= 0;
            flag <= 0;
            err <= 0;
            case (current_state)
                S5: if (!in) disc <= 1; // 0111110 detected
                S6: if (in) flag <= 1;  // 01111110 detected
                S7: if (in) err <= 1;   // 01111111 (error) detected
                default: begin
                    disc <= 0;
                    flag <= 0;
                    err <= 0;
                end
            endcase
        end
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum logic [2:0] {
        S0, // Initial state
        S1, // Saw 1
        S2, // Saw 11
        S3, // Saw 111
        S4, // Saw 1111
        S5, // Saw 11111
        S6, // Saw 011111
        S7, // Saw 0111111
        S8  // Error state (7 or more consecutive 1s)
    } state_t;

    state_t current_state, next_state;

    // Sequential logic: Move to the next state on every clock edge
    always @(posedge clk) begin
        if (reset)
            current_state <= S0;
        else
            current_state <= next_state;
    end

    // Combinational logic: Determine next state and outputs based on current state and input
    always @(*) begin
        // Default outputs
        disc = 0;
        flag = 0;
        err = 0;

        case (current_state)
            S0: begin
                if (in)
                    next_state = S1;
                else
                    next_state = S0;
            end
            S1: begin
                if (in)
                    next_state = S2;
                else
                    next_state = S0;
            end
            S2: begin
                if (in)
                    next_state = S3;
                else
                    next_state = S0;
            end
            S3: begin
                if (in)
                    next_state = S4;
                else
                    next_state = S0;
            end
            S4: begin
                if (in)
                    next_state = S5;
                else
                    next_state = S0;
            end
            S5: begin
                if (in)
                    next_state = S6;
                else
                    next_state = S0;
            end
            S6: begin
                if (in) begin
                    next_state = S7;
                    flag = 1; // 01111110 detected
                end
                else begin
                    next_state = S0;
                    disc = 1; // 0111110 detected
                end
            end
            S7: begin
                if (in) begin
                    next_state = S8;
                    err = 1;  // 7 or more 1s detected
                end
                else
                    next_state = S0;
            end
            S8: begin
                if (in)
                    next_state = S8;
                else
                    next_state = S0;
            end
            default: next_state = S0;
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    typedef enum reg [2:0] {
        S0,  // Initial state (After a reset or an input of 0)
        S1,  // 1
        S2,  // 11
        S3,  // 111
        S4,  // 1111
        S5,  // 11111
        S6,  // 111111
        S7   // 1111111 or more
    } state_t;

    state_t current_state, next_state;

    // State Register
    always @(posedge clk) begin
        if (reset)
            current_state <= S0;
        else
            current_state <= next_state;
    end

    // Next State Logic
    always @(*) begin
        // Default outputs
        disc = 1'b0;
        flag = 1'b0;
        err  = 1'b0;

        case (current_state)
            S0: next_state = in ? S1 : S0;
            S1: next_state = in ? S2 : S0;
            S2: next_state = in ? S3 : S0;
            S3: next_state = in ? S4 : S0;
            S4: next_state = in ? S5 : S0;
            S5: next_state = in ? S6 : S0;
            S6: begin
                if (in) begin
                    next_state = S7;
                    err = 1'b1;
                end else begin
                    next_state = S0;
                    flag = 1'b1;
                end
            end
            S7: begin
                if (in) begin
                    next_state = S7;
                    err = 1'b1;
                end else begin
                    next_state = S0;
                end
            end
        endcase

        // Output Logic for S5 (0111110)
        if (current_state == S5 && !in) begin
            disc = 1'b1;
        end
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err);

    typedef enum reg [2:0] {
        S0, // Initial state, previous input is 0
        S1, // 1
        S2, // 11
        S3, // 111
        S4, // 1111
        S5, // 11111
        S6, // 111110
        S7, // 111111 (flag or error based on next input)
        S8  // Error state for 1111111 and beyond
    } state_t;

    state_t state, next_state;

    always @ (posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

    always @ (*) begin
        // Default outputs
        disc = 0;
        flag = 0;
        err = 0;

        case (state)
            S0: begin
                if (in) next_state = S1;
                else next_state = S0;
            end
            S1: begin
                if (in) next_state = S2;
                else next_state = S0;
            end
            S2: begin
                if (in) next_state = S3;
                else next_state = S0;
            end
            S3: begin
                if (in) next_state = S4;
                else next_state = S0;
            end
            S4: begin
                if (in) next_state = S5;
                else next_state = S0;
            end
            S5: begin
                if (in) next_state = S6;
                else next_state = S0;
            end
            S6: begin
                if (in) next_state = S7;
                else begin
                    next_state = S0;
                    disc = 1;
                end
            end
            S7: begin
                if (in) begin
                    next_state = S8;
                    err = 1;
                end else begin
                    next_state = S0;
                    flag = 1;
                end
            end
            S8: begin
                if (in) begin
                    next_state = S8;
                    err = 1;
                end else
                    next_state = S0;
            end
            default: next_state = S0;
        endcase
    end
endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum reg [3:0] {
        S0,   // Initial state / after reset
        S1,   // 0
        S2,   // 01
        S3,   // 011
        S4,   // 0111
        S5,   // 01111
        S6,   // 011111
        S7,   // 0111111 (7 ones in sequence will be an error)
        S8,   // 01111110 (Flag detection)
        S_ERR // Error state
    } state_t;

    state_t current_state, next_state;

    // State update logic (sequential)
    always @(posedge clk) begin
        if (reset) begin
            current_state <= S0;
        end else begin
            current_state <= next_state;
        end
    end

    // Next state logic (combinatorial)
    always @(*) begin
        // Default assignments
        next_state = current_state;
        disc = 0;
        flag = 0;
        err = 0;

        case (current_state)
            S0: begin
                if (in == 1'b0)
                    next_state = S1;
                // else remain in S0
            end
            S1: begin
                if (in == 1'b1)
                    next_state = S2;
                else
                    next_state = S1;  // Reset on 0
            end
            S2: begin
                if (in == 1'b1)
                    next_state = S3;
                else
                    next_state = S1;  // Reset on 0
            end
            S3: begin
                if (in == 1'b1)
                    next_state = S4;
                else
                    next_state = S1;  // Reset on 0
            end
            S4: begin
                if (in == 1'b1)
                    next_state = S5;
                else
                    next_state = S1;  // Reset on 0
            end
            S5: begin
                if (in == 1'b1)
                    next_state = S6;
                else
                    next_state = S1;  // Reset on 0
            end
            S6: begin
                if (in == 1'b0) begin
                    next_state = S1;  // Back to initial after 0111110
                    disc = 1'b1;  // Signal discard
                end else begin
                    next_state = S7;
                end
            end
            S7: begin  // Possible flag detection
                if (in == 1'b0) begin
                    next_state = S8;  // Complete flag detected
                    flag = 1'b1;
                end else begin
                    next_state = S_ERR;  // More than 6 ones in a row
                end
            end
            S8: begin
                next_state = S0;  // State after flag detected
            end
            S_ERR: begin
                err = 1'b1;  // Error due to 7 or more consecutive 1s
                next_state = S_ERR;  // Remain in error state
            end
            default: begin
                next_state = S0;
            end
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum logic [3:0] {
        S0,  // start state, equivalent to seeing a '0'
        S1,  // seen one '1'
        S11, // seen two '1's
        S111, // seen three '1's
        S1111, // seen four '1's
        S11111, // seen five '1's
        S111110, // seen '0111110' (discard)
        S111111, // seen six '1's
        S1111110, // seen '01111110' (flag)
        S1111111, // seen seven '1's (error)
        Error
    } state_t;

    state_t state, next_state;

    // State transitions
    always @(posedge clk) begin
        if (reset) begin
            state <= S0;
        end else begin
            state <= next_state;
        end
    end

    // Next state logic
    always @(*) begin
        case (state)
            S0: next_state = in ? S1 : S0;
            S1: next_state = in ? S11 : S0;
            S11: next_state = in ? S111 : S0;
            S111: next_state = in ? S1111 : S0;
            S1111: next_state = in ? S11111 : S0;
            S11111: next_state = in ? S111111 : S111110;
            S111110: next_state = in ? S1 : S0; // Discard detected
            S111111: begin
                if (in) next_state = S1111111;
                else next_state = S1111110;
            end
            S1111110: next_state = in ? S1 : S0; // Flag detected
            S1111111: next_state = in ? Error : S0; // Error detected
            Error: next_state = in ? Error : S0;
            default: next_state = S0;
        endcase
    end

    // Output logic
    always @(posedge clk) begin
        if (reset) begin
            disc <= 0;
            flag <= 0;
            err <= 0;
        end else begin
            disc <= (state == S111110);
            flag <= (state == S1111110);
            err <= (state == S1111111) || (state == Error);
        end
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err);

    // State encoding
    parameter [2:0] S0 = 3'd0, // Initial state or after a '0'
                    S1 = 3'd1, // 0 -> 1
                    S2 = 3'd2, // 01 -> 11
                    S3 = 3'd3, // 011 -> 111
                    S4 = 3'd4, // 0111 -> 1111
                    S5 = 3'd5, // 01111 -> 11111
                    S6 = 3'd6, // 011111 -> 111111
                    S7 = 3'd7; // 0111111 -> 1111111 (Error or Flag)

    reg [2:0] state, next_state;

    // State transition
    always @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

    // Next state logic
    always @(*) begin
        case (state)
            S0: next_state = in ? S1 : S0;
            S1: next_state = in ? S2 : S0;
            S2: next_state = in ? S3 : S0;
            S3: next_state = in ? S4 : S0;
            S4: next_state = in ? S5 : S0;
            S5: next_state = in ? S6 : S0;
            S6: next_state = in ? S7 : S0;
            S7: next_state = in ? S7 : S0; // Stay in Error state if more 1's
            default: next_state = S0;
        endcase
    end

    // Output logic
    always @(*) begin
        disc = 0;
        flag = 0;
        err = 0;
        case (state)
            S5: disc = ~in; // Discard the 0 after 011111
            S6: flag = in;  // Flag for 01111110
            S7: err = in;   // Error for 7 or more 1's
        endcase
    end
endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State Encoding
    typedef enum logic [3:0] {
        STATE_ZERO      = 4'b0000,
        STATE_ONE       = 4'b0001,
        STATE_TWO       = 4'b0010,
        STATE_THREE     = 4'b0011,
        STATE_FOUR      = 4'b0100,
        STATE_FIVE      = 4'b0101,
        STATE_SIX       = 4'b0110,
        STATE_FLAG      = 4'b0111,
        STATE_ERROR     = 4'b1000
    } state_t;

    state_t state, next_state;

    // State transition logic (next state)
    always_comb begin
        case (state)
            STATE_ZERO: begin
                if (in)
                    next_state = STATE_ONE;
                else
                    next_state = STATE_ZERO;
            end
            STATE_ONE: begin
                if (in)
                    next_state = STATE_TWO;
                else
                    next_state = STATE_ZERO;
            end
            STATE_TWO: begin
                if (in)
                    next_state = STATE_THREE;
                else
                    next_state = STATE_ZERO;
            end
            STATE_THREE: begin
                if (in)
                    next_state = STATE_FOUR;
                else
                    next_state = STATE_ZERO;
            end
            STATE_FOUR: begin
                if (in)
                    next_state = STATE_FIVE;
                else
                    next_state = STATE_ZERO;
            end
            STATE_FIVE: begin
                if (in)
                    next_state = STATE_SIX; // possible flag or error
                else
                    next_state = STATE_ZERO; // 0111110 -> disc
            end
            STATE_SIX: begin
                if (in)
                    next_state = STATE_ERROR; // More than 6 ones, error
                else
                    next_state = STATE_FLAG; // 01111110, valid flag
            end
            STATE_FLAG: begin
                if (in)
                    next_state = STATE_ONE;
                else
                    next_state = STATE_ZERO;
            end
            STATE_ERROR: begin
                if (in)
                    next_state = STATE_ERROR;
                else
                    next_state = STATE_ZERO;
            end
            default: next_state = STATE_ZERO;
        endcase
    end

    // State flip-flops (sequential logic)
    always_ff @(posedge clk) begin
        if (reset)
            state <= STATE_ZERO;
        else
            state <= next_state;
    end

    // Output logic
    always_comb begin
        // Default outputs
        disc = 1'b0;
        flag = 1'b0;
        err = 1'b0;

        case (state)
            STATE_ZERO, STATE_ONE, STATE_TWO, STATE_THREE, STATE_FOUR: begin
                disc = 1'b0;
                flag = 1'b0;
                err = 1'b0;
            end
            STATE_FIVE: begin
                disc = !in;  // assert disc for sequence 0111110
                flag = 1'b0;
                err = 1'b0;
            end
            STATE_FLAG: begin
                flag = 1'b1; // assert flag for sequence 01111110
                disc = 1'b0;
                err = 1'b0;
            end
            STATE_ERROR: begin
                err = 1'b1; // assert err for 7 or more consecutive 1s
                disc = 1'b0;
                flag = 1'b0;
            end
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum reg [2:0] {
        S0, // Initial state (as if the previous input were 0)
        S1, // Saw one 1
        S2, // Saw two consecutive 1s
        S3, // Saw three consecutive 1s
        S4, // Saw four consecutive 1s
        S5, // Saw five consecutive 1s
        S6, // Detected pattern 0111110 (discard state)
        S7, // Full flag detected 01111110
        ERR // Detected error with 7 consecutive 1s
    } state_t;

    state_t state, next_state;

    // State transition logic (Moore FSM)
    always @(*) begin
        // Default outputs
        disc = 0;
        flag = 0;
        err = 0;

        case (state)
            S0: begin
                if (in)
                    next_state = S1;
                else
                    next_state = S0;
            end
            S1: begin
                if (in)
                    next_state = S2;
                else
                    next_state = S0;
            end
            S2: begin
                if (in)
                    next_state = S3;
                else
                    next_state = S0;
            end
            S3: begin
                if (in)
                    next_state = S4;
                else
                    next_state = S0;
            end
            S4: begin
                if (in)
                    next_state = S5;
                else
                    next_state = S0;
            end
            S5: begin
                if (in)
                    next_state = S6;
                else
                    next_state = S0;
            end
            S6: begin
                if (in)
                    next_state = S7; // 01111110
                else begin
                    next_state = S0; // 0111110
                    disc = 1;
                end
            end
            S7: begin
                if (in) begin
                    next_state = ERR; // 01111111 detected
                    err = 1;
                end else begin
                    next_state = S0; // 01111110 ends here
                    flag = 1;
                end
            end
            ERR: begin
                // Once in error state, stay until reset
                next_state = ERR;
                err = 1;
            end
            default: next_state = S0;
        endcase
    end

    // State flip-flops with synchronous reset
    always @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum reg [3:0] {
        S0, // initial state, previous input is considered as 0
        S1, // observed 0
        S2, // observed 01
        S3, // observed 011
        S4, // observed 0111
        S5, // observed 01111
        S6, // observed 011111
        S7, // observed 0111111
        S8  // observed 01111110
    } state_t;

    state_t current_state, next_state;

    // State transition
    always @(posedge clk) begin
        if (reset) begin
            current_state <= S0;
        end else begin
            current_state <= next_state;
        end
    end

    // Next state logic
    always @(*) begin
        // Default outputs
        disc = 0;
        flag = 0;
        err = 0;
        case (current_state)
            S0: next_state = in ? S0 : S1;
            S1: next_state = in ? S2 : S1;
            S2: next_state = in ? S3 : S1;
            S3: next_state = in ? S4 : S1;
            S4: next_state = in ? S5 : S1;
            S5: next_state = in ? S6 : S1;
            S6: next_state = in ? S7 : S8;
            S7: next_state = in ? S7 : S1; // ERR condition, stay in S7, as 7 or more 1s
            S8: next_state = in ? S2 : S1; // FLAG detected, reset counting
            default: next_state = S0;
        endcase
    end

    // Output logic
    always @(posedge clk) begin
        if (reset) begin
            disc <= 0;
            flag <= 0;
            err <= 0;
        end else begin
            case (current_state)
                S7: err <= 1;    // Detected 7 or more 1s
                S8: flag <= 1;   // Detected 01111110
                S6: if (!in) disc <= 1; // If next is 0, means 0111110 (bit stuffing)
                default: begin
                    disc <= 0;
                    flag <= 0;
                    err <= 0;
                end
            endcase
        end
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    typedef enum logic [2:0] {
        S0, // initial state
        S1, // observed a '0', no '1's yet or a series reset by a '0'
        S2, // observed 1 '1'
        S3, // observed 2 consecutive '1's
        S4, // observed 3 consecutive '1's
        S5, // observed 4 consecutive '1's
        S6, // observed 5 consecutive '1's
        S7, // observed 6 consecutive '1's (full flag)
        S8  // Error state (more than 6 '1's)
    } state_t;

    state_t state, next_state;

    // State transition
    always_ff @(posedge clk) begin
        if (reset)
            state <= S0;
        else
            state <= next_state;
    end

    // Next state logic
    always_comb begin
        disc = 0;
        flag = 0;
        err = 0;
        case (state)
            S0: begin
                if (in) next_state = S2;
                else next_state = S1;
            end
            S1: begin
                if (in) next_state = S2;
                else next_state = S1;
            end
            S2: begin
                if (in) next_state = S3;
                else next_state = S1;
            end
            S3: begin
                if (in) next_state = S4;
                else next_state = S1;
            end
            S4: begin
                if (in) next_state = S5;
                else next_state = S1;
            end
            S5: begin
                if (in) next_state = S6;
                else next_state = S1;
            end
            S6: begin
                if (in) next_state = S7;
                else begin
                    next_state = S1;
                    disc = 1;
                end
            end
            S7: begin
                if (in) next_state = S8;
                else begin
                    next_state = S1;
                    flag = 1;
                end
            end
            S8: begin
                next_state = S8;
                err = 1;
            end
            default: next_state = S0;
        endcase
    end

endmodule

module top_module (
    input clk,
    input reset,
    input in,
    output reg disc,
    output reg flag,
    output reg err
);

    // State encoding
    typedef enum reg [3:0] {
        S0, // Initial state or after 0 detected
        S1, // After detecting 01
        S2, // After detecting 011
        S3, // After detecting 0111
        S4, // After detecting 01111
        S5, // After detecting 011111
        S6, // After detecting 0111111 (disc or flag)
        S7  // After detecting 01111111 (error state)
    } state_t;

    state_t current_state, next_state;

    // State transition
    always @(posedge clk) begin
        if (reset)
            current_state <= S0;
        else
            current_state <= next_state;
    end

    // Next state logic and output logic
    always @(*) begin
        // Default outputs
        disc = 1'b0;
        flag = 1'b0;
        err = 1'b0;

        case (current_state)
            S0: begin
                if (in == 1'b1)
                    next_state = S1;
                else
                    next_state = S0;
            end
            S1: begin
                if (in == 1'b1)
                    next_state = S2;
                else
                    next_state = S0;
            end
            S2: begin
                if (in == 1'b1)
                    next_state = S3;
                else
                    next_state = S0;
            end
            S3: begin
                if (in == 1'b1)
                    next_state = S4;
                else
                    next_state = S0;
            end
            S4: begin
                if (in == 1'b1)
                    next_state = S5;
                else
                    next_state = S0;
            end
            S5: begin
                if (in == 1'b1)
                    next_state = S6;
                else
                    next_state = S0;
            end
            S6: begin
                if (in == 1'b0) begin
                    disc = 1'b1;
                    next_state = S0;
                end
                else
                    next_state = S7;
            end
            S7: begin
                if (in == 1'b0) begin
                    flag = 1'b1;
                    next_state = S0;
                end
                else begin
                    err = 1'b1;
                    next_state = S7;
                end
            end
            default: next_state = S0;
        endcase
    end

endmodule