TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man with scruffy hair wearing a tie and glasses'. Replace the letter 'r' with 'f' in the sentence.

SOLUTION: a man with scfuffy haif weafing a tie and glasses

PROBLEM: Sentence: 'a chocolate cake decorated with strawberries on the side'. Replace the letter 'c' with 'x' in the sentence.

SOLUTION: a xhoxolate xake dexorated with strawberries on the side

PROBLEM: Sentence: 'a cat looking at itself through a mirror'. Replace the letter 'i' with 'w' in the sentence.

SOLUTION:
a cat lookwng at wtself through a mwrror