TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a dog with his tongue out riding on a skateboard'. Replace the letter 's' with 'b' in the sentence.

SOLUTION: a dog with hib tongue out riding on a bkateboard

PROBLEM: Sentence: 'the living room is designed with brown and beige colors'. Replace the letter 'i' with 'b' in the sentence.

SOLUTION: the lbvbng room bs desbgned wbth brown and bebge colors

PROBLEM: Sentence: 'a red stop sign next to a street in front of a green street sign'. Replace the letter 'r' with 'w' in the sentence.

SOLUTION:
a wed stop sign next to a stweet in fwont of a gween stweet sign