Which coin of U.S currency has the most ridges.
The U.S. half dollar is the winner with 150 ridges.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Which coin of U.S currency has the most ridges.
### Input: 
### Response: The U.S. half dollar is the winner with 150 ridges.</s>