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

[EX Q]: Sentence: 'a back pack and lap top sit on the kitchen counter'. Replace the letter 't' with 'k' in the sentence.
[EX A]: a back pack and lap kop sik on khe kikchen counker

[EX Q]: Sentence: 'a fire hydrant with a message painted on it'. Replace the letter 'n' with 'j' in the sentence.
[EX A]: a fire hydrajt with a message paijted oj it

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