TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a woman is playing tennis on the tennis court'. Replace the letter 'r' with 'z' in the sentence.

SOLUTION: a woman is playing tennis on the tennis couzt

PROBLEM: Sentence: 'a row of lawn chairs with umbrellas over them'. Replace the letter 'e' with 'x' in the sentence.

SOLUTION: a row of lawn chairs with umbrxllas ovxr thxm

PROBLEM: Sentence: 'a pizza that has a fork on it'. Replace the letter 'r' with 'j' in the sentence.

SOLUTION:
a pizza that has a fojk on it