TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a formal dinning room in a stately manor'. Replace the letter 'n' with 'o' in the sentence.

SOLUTION: a formal diooiog room io a stately maoor

PROBLEM: Sentence: 'a couple of giraffe standing next to each other near  a fence'. Replace the letter 'f' with 'j' in the sentence.

SOLUTION: a couple oj girajje standing next to each other near  a jence

PROBLEM: Sentence: 'a man walking down a street while talking on a phone'. Replace the letter 'i' with 'e' in the sentence.

SOLUTION:
a man walkeng down a street whele talkeng on a phone