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

Example Input: Sentence: 'a refrigerator with both its doors open in a kitchen'. Replace the letter 'o' with 'x' in the sentence.
Example Output: a refrigeratxr with bxth its dxxrs xpen in a kitchen

Example Input: Sentence: 'this is a bathroom found in a hotel'. Replace the letter 'h' with 's' in the sentence.
Example Output: tsis is a batsroom found in a sotel

Example Input: Sentence: 'men stand and have a conversation near a hole in the road'. Replace the letter 'e' with 'f' in the sentence.
Example Output:
mfn stand and havf a convfrsation nfar a holf in thf road