TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.

SOLUTION: a bunsh of signs on a pole on the street

PROBLEM: Sentence: 'a small plastic dish with food in it'. Replace the letter 'p' with 'g' in the sentence.

SOLUTION: a small glastic dish with food in it

PROBLEM: Sentence: 'two people sit on a pier at a lake'. Replace the letter 's' with 'd' in the sentence.

SOLUTION:
two people dit on a pier at a lake