TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man stands in front of a plane on a take off strip'. Replace the letter 'n' with 'o' in the sentence.

SOLUTION: a mao staods io froot of a plaoe oo a take off strip

PROBLEM: Sentence: 'a toilet and a microwave sitting out for the trash'. Replace the letter 'i' with 's' in the sentence.

SOLUTION: a toslet and a mscrowave ssttsng out for the trash

PROBLEM: Sentence: 'the elderly gentleman rests on a park bench in the fall season'. Replace the letter 'a' with 'y' in the sentence.

SOLUTION:
the elderly gentlemyn rests on y pyrk bench in the fyll seyson