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: 'a man sitting at a table and using his laptop'. Replace the letter 'd' with 'o' in the sentence.

SOLUTION: a man sitting at a table ano using his laptop

PROBLEM: Sentence: 'a boy in jeans and a gray shirt stands near a green tree and in the air is a large triangle flag'. Replace the letter 'i' with 'j' in the sentence.

SOLUTION:
a boy jn jeans and a gray shjrt stands near a green tree and jn the ajr js a large trjangle flag