TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a male holding a baseball bat standing on a big white star'. Replace the letter 'a' with 'i' in the sentence.

SOLUTION: i mile holding i bisebill bit stinding on i big white stir

PROBLEM: Sentence: 'a couple of horses with carriages at a building'. Replace the letter 'u' with 'm' in the sentence.

SOLUTION: a comple of horses with carriages at a bmilding

PROBLEM: Sentence: 'a person wearing a red shirt is flying a kite at the beach'. Replace the letter 'c' with 'j' in the sentence.

SOLUTION:
a person wearing a red shirt is flying a kite at the beajh