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

[EX Q]: Sentence: 'an old rusty car sits outside of an old building'. Replace the letter 'o' with 'r' in the sentence.
[EX A]: an rld rusty car sits rutside rf an rld building

[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 sandwich topped with condiments served with fries'. Replace the letter 'e' with 'b' in the sentence.
[EX A]:
a sandwich toppbd with condimbnts sbrvbd with fribs