TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man sitting on a luggage cart inside of an airport'. Replace the letter 't' with 'a' in the sentence.

SOLUTION: a man siaaing on a luggage cara inside of an airpora

PROBLEM: Sentence: 'a boy is sitting at a dinner table with his food'. Replace the letter 't' with 'r' in the sentence.

SOLUTION: a boy is sirring ar a dinner rable wirh his food

PROBLEM: Sentence: 'a dog sits on a leather couch in front of a coffee table and laptop'. Replace the letter 'u' with 'y' in the sentence.

SOLUTION:
a dog sits on a leather coych in front of a coffee table and laptop