TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a herd of zebra stand together and eat grass'. Replace the letter 'n' with 'r' in the sentence.

SOLUTION: a herd of zebra stard together ard eat grass

PROBLEM: Sentence: 'two cats sitting on an office chair next to a desk'. Replace the letter 's' with 'j' in the sentence.

SOLUTION: two catj jitting on an office chair next to a dejk

PROBLEM: Sentence: 'a man in a tie in a picture with a tennis racket'. Replace the letter 'h' with 'e' in the sentence.

SOLUTION:
a man in a tie in a picture wite a tennis racket