TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'this is a man and boy holding skis'. Replace the letter 'h' with 'l' in the sentence.

SOLUTION: tlis is a man and boy lolding skis

PROBLEM: Sentence: 'a close up of a train on train tracks at night'. Replace the letter 'n' with 'm' in the sentence.

SOLUTION: a close up of a traim om traim tracks at might

PROBLEM: Sentence: 'two red cars parked in a parking lot near a clock tower'. Replace the letter 'l' with 'd' in the sentence.

SOLUTION:
two red cars parked in a parking dot near a cdock tower