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 painting of scissors going to cut a chain with a lock'. Replace the letter 'g' with 'v' in the sentence.

Ex Output:
a paintinv of scissors voinv to cut a chain with a lock


Ex Input:
Sentence: 'a bedroom with tv, computer, and bookshelves in it'. Replace the letter 'm' with 'z' in the sentence.

Ex Output:

a bedrooz with tv, cozputer, and bookshelves in it