TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a couple of giraffes being feed by people at the zoo'. Replace the letter 't' with 'v' in the sentence.

SOLUTION: a couple of giraffes being feed by people av vhe zoo

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: 'stuffed teddy bear sitting on top of a pile of green bananas'. Replace the letter 'a' with 'v' in the sentence.

SOLUTION:
stuffed teddy bevr sitting on top of v pile of green bvnvnvs