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

Example Input: Sentence: 'a black and white picture of a hitter awaiting a pitch while a teammate stands in the on deck circle'. Replace the letter 'a' with 'm' in the sentence.
Example Output: m blmck mnd white picture of m hitter mwmiting m pitch while m temmmmte stmnds in the on deck circle

Example Input: Sentence: 'a group of men sitting at a desk with lap top computers'. Replace the letter 'p' with 'z' in the sentence.
Example Output: a grouz of men sitting at a desk with laz toz comzuters

Example Input: Sentence: 'a refrigerator with a microwave on top of it'. Replace the letter 'c' with 'u' in the sentence.
Example Output:
a refrigerator with a miurowave on top of it