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

[EX Q]: Sentence: 'a cat sits on the floor next to a purse'. Replace the letter 'a' with 'b' in the sentence.
[EX A]: b cbt sits on the floor next to b purse

[EX Q]: Sentence: 'a photo of a river with a train bridge across it'. Replace the letter 'r' with 'f' in the sentence.
[EX A]: a photo of a fivef with a tfain bfidge acfoss it

[EX Q]: Sentence: 'a man holds a circuit board and examines it intently'. Replace the letter 'c' with 'm' in the sentence.
[EX A]:
a man holds a mirmuit board and examines it intently