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

Example Input: Sentence: 'this refrigerator is covered in stickers on it'. Replace the letter 't' with 'h' in the sentence.
Example Output: hhis refrigerahor is covered in shickers on ih

Example Input: Sentence: 'a plate topped with waffles, bacon and banana slices'. Replace the letter 'a' with 'k' in the sentence.
Example Output: k plkte topped with wkffles, bkcon knd bknknk slices

Example Input: Sentence: 'a street sign on top of a pole next to a large green tree'. Replace the letter 'g' with 'e' in the sentence.
Example Output:
a street sien on top of a pole next to a laree ereen tree