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

[EX Q]: Sentence: 'a crooked street sign on a damaged sidewalk'. Replace the letter 'm' with 'u' in the sentence.
[EX A]: a crooked street sign on a dauaged sidewalk

[EX Q]: Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.
[EX A]: people wbtching b kite being flown with b sky bbckground

[EX Q]: Sentence: 'three elephants are walking near the border of a lake'. Replace the letter 't' with 'p' in the sentence.
[EX A]:
phree elephanps are walking near phe border of a lake