Given a list of elements, find how many possible combinations of the elements can be made.
H, O, C, N
There are 24 possible combinations of the elements.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Given a list of elements, find how many possible combinations of the elements can be made.

### Response:
There are 24 possible combinations of the elements.