TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a skater looks ahead as he rides down a ramp'. Replace the letter 'n' with 'm' in the sentence.

SOLUTION: a skater looks ahead as he rides dowm a ramp

PROBLEM: Sentence: 'a red park ride bus at a curb with a green/white bus behind'. Replace the letter 'h' with 'x' in the sentence.

SOLUTION: a red park ride bus at a curb witx a green/wxite bus bexind

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