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

[EX Q]: Sentence: 'a book shelf full of books and nick nacks '. Replace the letter 'o' with 'm' in the sentence.
[EX A]: a bmmk shelf full mf bmmks and nick nacks 

[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

[EX Q]: Sentence: 'a bunch of kids playing soccer together in grass'. Replace the letter 'e' with 'g' in the sentence.
[EX A]:
a bunch of kids playing soccgr toggthgr in grass