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

Ex Input:
Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.

Ex Output:
people wbtching b kite being flown with b sky bbckground


Ex Input:
Sentence: 'a person holding a small remote key chain'. Replace the letter 'n' with 'j' in the sentence.

Ex Output:
a persoj holdijg a small remote key chaij


Ex Input:
Sentence: 'a couple of chairs are sitting beside a plant'. Replace the letter 'd' with 'f' in the sentence.

Ex Output:

a couple of chairs are sitting besife a plant