TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a no parking sign next to a car riding down a street'. Replace the letter 'g' with 'l' in the sentence.

SOLUTION: a no parkinl siln next to a car ridinl down a street

PROBLEM: Sentence: 'a cat sits on the floor next to a purse'. Replace the letter 'a' with 'b' in the sentence.

SOLUTION: b cbt sits on the floor next to b purse

PROBLEM: Sentence: 'a black bird is sitting on a thing wire'. Replace the letter 'h' with 'k' in the sentence.

SOLUTION:
a black bird is sitting on a tking wire