Bob originally had 20 pencils.   4 of the pencils broke.  How many pencils does Bob now have?
Bob has 16 unbroken pencils.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:

Bob originally had 20 pencils.   4 of the pencils broke.  How many pencils does Bob now have?

### Response:

Bob has 16 unbroken pencils.
