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

[EX Q]: Sentence: 'a small train is on the tracks by a house'. Replace the letter 'l' with 'x' in the sentence.
[EX A]: a smaxx train is on the tracks by a house

[EX Q]: Sentence: 'a wooden bench near a tree and a stone wall'. Replace the letter 'l' with 'q' in the sentence.
[EX A]: a wooden bench near a tree and a stone waqq

[EX Q]: Sentence: 'a man riding a wave on top of a surfboard'. Replace the letter 'n' with 'a' in the sentence.
[EX A]:
a maa ridiag a wave oa top of a surfboard