In this task, you need to replace a letter in the sentence with another given letter.

Sentence: 'a red stop sign sitting on the side of a road'. Replace the letter 'r' with 'o' in the sentence.
a oed stop sign sitting on the side of a ooad

Sentence: 'small kit bathroom sink with purple walls and lights on it'. Replace the letter 'o' with 'r' in the sentence.
small kit bathrrrm sink with purple walls and lights rn it

Sentence: 'elephants are walking down a road and one elephant is on the side of the road'. Replace the letter 'e' with 'b' in the sentence.

blbphants arb walking down a road and onb blbphant is on thb sidb of thb road