Given a sentence, identify the punctuation marks present.
The cat slept on the sofa!
The punctuation mark present in the sentence "The cat slept on the sofa!" is an exclamation point (!).
Complete the following task based on the instruction and optional input provided.### Instruction:
Given a sentence, identify the punctuation marks present.

### Input:
The cat slept on the sofa!

### Output:
The punctuation mark present in the sentence "The cat slept on the sofa!" is an exclamation point (!).