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:
Read this poem and describe the theme in one sentence

### Input:
The fog comes
on little cat feet.
It sits looking
over harbor and city
on silent haunches
and then moves on.

### Response:
The theme of this poem is the mysterious, soft, and fleeting presence of fog in an urban environment.