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

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

Sentence: 'a white stove top oven sitting in a kitchen'. Replace the letter 'k' with 'b' in the sentence.
a white stove top oven sitting in a bitchen

Sentence: 'a vase with flowers in it that is wilting away'. Replace the letter 'w' with 'q' in the sentence.
a vase qith floqers in it that is qilting aqay