TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a hand holding part of a sponge with scissors nearby'. Replace the letter 'o' with 'e' in the sentence.

SOLUTION: a hand helding part ef a spenge with scissers nearby

PROBLEM: Sentence: 'a busy intersection with cars moving at night'. Replace the letter 's' with 'f' in the sentence.

SOLUTION: a bufy interfection with carf moving at night

PROBLEM: Sentence: 'a computer sits on top of a wooden desk'. Replace the letter 'o' with 'a' in the sentence.

SOLUTION:
a camputer sits an tap af a waaden desk