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: 'a child holding a tv remote like a phone'. Replace the letter 'i' with 'b' in the sentence.

Ex Output:
a chbld holdbng a tv remote lbke a phone


Ex Input:
Sentence: 'a man riding a wave on a surfboard'. Replace the letter 'a' with 'c' in the sentence.

Ex Output:

c mcn riding c wcve on c surfbocrd