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

Sentence: 'busy city street with pedestrians and cars with lights all around'. Replace the letter 'r' with 'k' in the sentence.
busy city stkeet with pedestkians and caks with lights all akound

Sentence: 'commuter trains on tracks next to paved platform'. Replace the letter 'm' with 'w' in the sentence.
cowwuter trains on tracks next to paved platforw

Sentence: 'a group of little girls and boys stand together to take a picture'. Replace the letter 'u' with 'w' in the sentence.

a growp of little girls and boys stand together to take a pictwre