TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
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: 'a woman sitting in front of a laptop computer'. Replace the letter 'u' with 'o' in the sentence.

SOLUTION: a woman sitting in front of a laptop compoter

PROBLEM: Sentence: 'a woman sitting by herself near a large building'. Replace the letter 'i' with 'q' in the sentence.

SOLUTION:
a woman sqttqng by herself near a large buqldqng