TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man is on a bed with a cat and laptop computer'. Replace the letter 'e' with 'n' in the sentence.

SOLUTION: a man is on a bnd with a cat and laptop computnr

PROBLEM: Sentence: 'a couple of horses with carriages at a building'. Replace the letter 'u' with 'm' in the sentence.

SOLUTION: a comple of horses with carriages at a bmilding

PROBLEM: Sentence: 'a man is sitting in the car and using his laptop'. Replace the letter 'a' with 'o' in the sentence.

SOLUTION:
o mon is sitting in the cor ond using his loptop