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

Ex Input:
Sentence: 'a group of people riding skis on a snowy surface'. Replace the letter 'p' with 'i' in the sentence.

Ex Output:
a groui of ieoile riding skis on a snowy surface


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: 'people enjoying lunch in a patio setting on a sunny day'. Replace the letter 'u' with 's' in the sentence.

Ex Output:

people enjoying lsnch in a patio setting on a ssnny day