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 baby pokes his head out of a suitcase'. Replace the letter 'u' with 's' in the sentence.

SOLUTION: a baby pokes his head ost of a ssitcase

PROBLEM: Sentence: 'a bunch of boats tied up near a beach'. Replace the letter 'u' with 'o' in the sentence.

SOLUTION:
a bonch of boats tied op near a beach