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

Example Input: Sentence: 'sliced pizza served on plate next to beverage at table'. Replace the letter 'n' with 'y' in the sentence.
Example Output: sliced pizza served oy plate yext to beverage at table

Example Input: Sentence: 'a man riding a snowboard on the side of a wall'. Replace the letter 'm' with 'p' in the sentence.
Example Output: a pan riding a snowboard on the side of a wall

Example Input: Sentence: 'a traffic light sitting next to a tree on the side of a street'. Replace the letter 'l' with 'z' in the sentence.
Example Output:
a traffic zight sitting next to a tree on the side of a street