TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a person holding a green cell phone in a classroom with many desks'. Replace the letter 'k' with 'w' in the sentence.

SOLUTION: a person holding a green cell phone in a classroom with many desws

PROBLEM: Sentence: 'a person is riding a motorcycle as part of some kind of performance'. Replace the letter 'm' with 'a' in the sentence.

SOLUTION: a person is riding a aotorcycle as part of soae kind of perforaance

PROBLEM: Sentence: 'a large airplane flying over a building with people walking below'. Replace the letter 'b' with 'j' in the sentence.

SOLUTION:
a large airplane flying over a juilding with people walking jelow