TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a person and a dog are on a bench'. Replace the letter 'e' with 'r' in the sentence.

SOLUTION: a prrson and a dog arr on a brnch

PROBLEM: Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.

SOLUTION: a woman holding a tennis lacket getting leady to hit a tennis ball

PROBLEM: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.

SOLUTION:
some brown blnck nnd white horses clouds nnd rocks