TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a large elephant that has people all around it'. Replace the letter 'h' with 'm' in the sentence.

SOLUTION: a large elepmant tmat mas people all around it

PROBLEM: Sentence: 'two men running for a soccer ball on a field'. Replace the letter 'd' with 'a' in the sentence.

SOLUTION: two men running for a soccer ball on a fiela

PROBLEM: Sentence: 'a single zebra eating some grass close to a building'. Replace the letter 'o' with 'r' in the sentence.

SOLUTION:
a single zebra eating srme grass clrse tr a building