TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a broken suitcase on a small tile floor with the contents exposed'. Replace the letter 'u' with 'z' in the sentence.

SOLUTION: a broken szitcase on a small tile floor with the contents exposed

PROBLEM: Sentence: 'a group of men and women sitting next to each other'. Replace the letter 'p' with 'l' in the sentence.

SOLUTION: a groul of men and women sitting next to each other

PROBLEM: Sentence: 'a man in a red shirt is eating his lunch outdoors'. Replace the letter 's' with 'x' in the sentence.

SOLUTION:
a man in a red xhirt ix eating hix lunch outdoorx