TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
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: 'a couple of men playing a  game of tennis'. Replace the letter 'n' with 'c' in the sentence.

SOLUTION: a couple of mec playicg a  game of teccis

PROBLEM: Sentence: 'a kitchen and a living room behind it'. Replace the letter 'n' with 'u' in the sentence.

SOLUTION:
a kitcheu aud a liviug room behiud it