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

Ex Input:
Sentence: 'a brown door  that says gentlemen and a toilet'. Replace the letter 'o' with 'f' in the sentence.

Ex Output:
a brfwn dffr  that says gentlemen and a tfilet


Ex Input:
Sentence: 'two kids sitting on a  child's bed and smiling'. Replace the letter 't' with 's' in the sentence.

Ex Output:
swo kids sissing on a  child's bed and smiling


Ex Input:
Sentence: 'this is a boy playing a baseball game'. Replace the letter 'y' with 'z' in the sentence.

Ex Output:

this is a boz plazing a baseball game