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

Ex Input:
Sentence: 'a person holding a green cell phone in a classroom with many desks'. Replace the letter 'k' with 'w' in the sentence.

Ex Output:
a person holding a green cell phone in a classroom with many desws


Ex Input:
Sentence: 'a boy taking a nap with his dog on a bed'. Replace the letter 'o' with 'i' in the sentence.

Ex Output:
a biy taking a nap with his dig in a bed


Ex Input:
Sentence: 'candles and flowers neatly placed on a table'. Replace the letter 's' with 'q' in the sentence.

Ex Output:

candleq and flowerq neatly placed on a table