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

[Q]: Sentence: 'an old rusty car sits outside of an old building'. Replace the letter 'o' with 'r' in the sentence.
[A]: an rld rusty car sits rutside rf an rld building


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


[Q]: Sentence: 'this living room has wood floors and different colored chairs'. Replace the letter 'f' with 'n' in the sentence.
[A]:
this living room has wood nloors and dinnerent colored chairs