TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man is ordering food from a mobile food truck'. Replace the letter 'r' with 'q' in the sentence.

SOLUTION: a man is oqdeqing food fqom a mobile food tquck

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: 'multiple country flags lined up in front of big ben'. Replace the letter 't' with 'r' in the sentence.

SOLUTION:
mulriple counrry flags lined up in fronr of big ben