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

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


[Q]: Sentence: 'a computer, keyboard, and mouse sitting on a desk'. Replace the letter 's' with 'c' in the sentence.
[A]: a computer, keyboard, and mouce citting on a deck


[Q]: Sentence: 'a toilet is on display at a trade show'. Replace the letter 'i' with 'c' in the sentence.
[A]:
a toclet cs on dcsplay at a trade show