task:
Hello, you are a hardware engineering assistant. You will be given a description of an RTL circuit and its corresponding module header in verilog.
Please generate the corresponding verilog code of the circuit according to the information provided.

tips:
please only reply me the RTL circuit code in verilog
you have enough tokens to response


reply format:
```verilog
(verilog code)
```

RTL problem description (this can help you understand the RTL code):
{$problem description from HDLBits$}

RTL module:
{$header from HDLBits$}