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

Sentence: 'a man on a surfboard riding on the waters waves'. Replace the letter 's' with 'k' in the sentence.
a man on a kurfboard riding on the waterk wavek

Sentence: 'a teddy bear dressed in denim is laying on a floor'. Replace the letter 'i' with 'd' in the sentence.
a teddy bear dressed dn dendm ds laydng on a floor

Sentence: 'a red stop sign on the side of a bus has been vandalized'. Replace the letter 'a' with 'l' in the sentence.

l red stop sign on the side of l bus hls been vlndllized