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

Example Input: Sentence: 'a group of people on a beach flying a kite'. Replace the letter 'p' with 'i' in the sentence.
Example Output: a groui of ieoile on a beach flying a kite

Example Input: Sentence: 'someone playing frisbee with a dog in the middle of a court'. Replace the letter 'd' with 'r' in the sentence.
Example Output: someone playing frisbee with a rog in the mirrle of a court

Example Input: Sentence: 'a large herd of zebras are grazing in front of a rock formation'. Replace the letter 'n' with 'q' in the sentence.
Example Output:
a large herd of zebras are graziqg iq froqt of a rock formatioq