In this task, you need to replace a letter in the sentence with another given letter.

Sentence: 'a small bird perched on some thin branches'. Replace the letter 'a' with 'f' in the sentence.
f smfll bird perched on some thin brfnches

Sentence: 'an older man wearing a suit and tie'. Replace the letter 'i' with 't' in the sentence.
an older man weartng a sutt and tte

Sentence: 'a small girl sits on a suit case'. Replace the letter 'm' with 'q' in the sentence.

a sqall girl sits on a suit case