TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man standing on a tennis court holding a tennis racquet'. Replace the letter 'c' with 'y' in the sentence.

SOLUTION: a man standing on a tennis yourt holding a tennis rayquet

PROBLEM: Sentence: 'a teddy bear dressed in denim is laying on a floor'. Replace the letter 'i' with 'd' in the sentence.

SOLUTION: a teddy bear dressed dn dendm ds laydng on a floor

PROBLEM: Sentence: 'a person pushes the letter "l" on a smartphone'. Replace the letter 's' with 'r' in the sentence.

SOLUTION:
a perron purher the letter "l" on a rmartphone