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

Ex Input:
Sentence: 'a bunch of red apples next to a few oranges'. Replace the letter 'n' with 'x' in the sentence.

Ex Output:
a buxch of red apples xext to a few oraxges


Ex Input:
Sentence: 'a small train is on the tracks by a house'. Replace the letter 'l' with 'x' in the sentence.

Ex Output:
a smaxx train is on the tracks by a house


Ex Input:
Sentence: 'a double photo of a woman with a tennis racket on a tennis court'. Replace the letter 't' with 'q' in the sentence.

Ex Output:

a double phoqo of a woman wiqh a qennis rackeq on a qennis courq