TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a large elephant standing outside beside a tree'. Replace the letter 'e' with 'y' in the sentence.

SOLUTION: a largy ylyphant standing outsidy bysidy a tryy

PROBLEM: Sentence: 'a ping pong player is in a ready stance to return the ball'. Replace the letter 'n' with 'e' in the sentence.

SOLUTION: a pieg poeg player is ie a ready staece to reture the ball

PROBLEM: Sentence: 'a bouquet of flowers in a vase sitting on a table'. Replace the letter 't' with 'b' in the sentence.

SOLUTION:
a bouqueb of flowers in a vase sibbing on a bable