TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a large white sign with black lettering  leaning against a metal fence'. Replace the letter 'e' with 'j' in the sentence.

SOLUTION: a largj whitj sign with black ljttjring  ljaning against a mjtal fjncj

PROBLEM: Sentence: 'the cargo train is headed to the next destination'. Replace the letter 'h' with 'x' in the sentence.

SOLUTION: txe cargo train is xeaded to txe next destination

PROBLEM: Sentence: 'a bowl filled with ripe bananas next to apples and oranges'. Replace the letter 'i' with 'q' in the sentence.

SOLUTION:
a bowl fqlled wqth rqpe bananas next to apples and oranges