TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'three men playing in a men's doubles tennis match'. Replace the letter 'e' with 'l' in the sentence.

SOLUTION: thrll mln playing in a mln's doublls tlnnis match

PROBLEM: Sentence: 'a crooked street sign on a damaged sidewalk'. Replace the letter 'm' with 'u' in the sentence.

SOLUTION: a crooked street sign on a dauaged sidewalk

PROBLEM: Sentence: 'child eating a round doughnut with brown sugar'. Replace the letter 'h' with 'y' in the sentence.

SOLUTION:
cyild eating a round dougynut wity brown sugar