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

Ex Input:
Sentence: 'a group of men sitting at a desk with lap top computers'. Replace the letter 'p' with 'z' in the sentence.

Ex Output:
a grouz of men sitting at a desk with laz toz comzuters


Ex Input:
Sentence: 'a man with a backpack on a motorcycle'. Replace the letter 't' with 'd' in the sentence.

Ex Output:
a man widh a backpack on a modorcycle


Ex Input:
Sentence: 'boy in a blue shirt in front of building with yellow and blue waves'. Replace the letter 'o' with 'y' in the sentence.

Ex Output:

byy in a blue shirt in frynt yf building with yellyw and blue waves