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

Example Input: Sentence: 'two zebras are snuggling at the zoo in their display area'. Replace the letter 'e' with 'z' in the sentence.
Example Output: two zzbras arz snuggling at thz zoo in thzir display arza

Example Input: Sentence: 'a group of young people playing a game of soccer'. Replace the letter 'c' with 'o' in the sentence.
Example Output: a group of young people playing a game of soooer

Example Input: Sentence: 'a blue surfboard is lying in the sand and the ocean is in the background'. Replace the letter 'h' with 'i' in the sentence.
Example Output:
a blue surfboard is lying in tie sand and tie ocean is in tie background