TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a herd of zebra grazing in a lush green field'. Replace the letter 'h' with 'j' in the sentence.

SOLUTION: a jerd of zebra grazing in a lusj green field

PROBLEM: Sentence: 'the big sandwich features several different  colorful ingredients'. Replace the letter 'e' with 'o' in the sentence.

SOLUTION: tho big sandwich foaturos sovoral difforont  colorful ingrodionts

PROBLEM: Sentence: 'a squirrel figurine with two street signs above it'. Replace the letter 'r' with 'm' in the sentence.

SOLUTION:
a squimmel figumine with two stmeet signs above it