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

[EX Q]: Sentence: 'a man is ordering food from a mobile food truck'. Replace the letter 'r' with 'q' in the sentence.
[EX A]: a man is oqdeqing food fqom a mobile food tquck

[EX Q]: Sentence: 'a person standing on some skis going through the snow'. Replace the letter 'o' with 'l' in the sentence.
[EX A]: a persln standing ln slme skis gling thrlugh the snlw

[EX Q]: Sentence: 'two towers are on a church building behind a wall'. Replace the letter 'i' with 'l' in the sentence.
[EX A]:
two towers are on a church bulldlng behlnd a wall