Replace the words "a" and "the" with synonyms to make the following sentence more interesting.
A cat was sitting on the chair.
One feline was perched on top of an armchair.
Complete the following task based on the instruction and optional input provided.### Instruction:
Replace the words "a" and "the" with synonyms to make the following sentence more interesting.

### Input:
A cat was sitting on the chair.

### Output:
One feline was perched on top of an armchair.