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 blue and white train is coming down some tracks'. Replace the letter 'b' with 'u' in the sentence.

SOLUTION: a ulue and white train is coming down some tracks

PROBLEM: Sentence: 'a man holds white flowers up to a camera'. Replace the letter 'o' with 'q' in the sentence.

SOLUTION:
a man hqlds white flqwers up tq a camera