TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a table that has a pizza sitting on it'. Replace the letter 'a' with 'w' in the sentence.

SOLUTION: w twble thwt hws w pizzw sitting on it

PROBLEM: Sentence: 'two tennis players shaking hands across the net'. Replace the letter 't' with 's' in the sentence.

SOLUTION: swo sennis players shaking hands across she nes

PROBLEM: Sentence: 'a couple of coaches in a cluttered living room'. Replace the letter 'a' with 'f' in the sentence.

SOLUTION:
f couple of cofches in f cluttered living room