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

Ex Input:
Sentence: 'a baseball player up to bat that just hit the ball'. Replace the letter 'r' with 'o' in the sentence.

Ex Output:
a baseball playeo up to bat that just hit the ball


Ex Input:
Sentence: 'a building has a clock on the top of it'. Replace the letter 'l' with 'x' in the sentence.

Ex Output:
a buixding has a cxock on the top of it


Ex Input:
Sentence: 'a mouse sitting on a book under an illustration of a tree'. Replace the letter 't' with 'h' in the sentence.

Ex Output:

a mouse sihhing on a book under an illushrahion of a hree