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

Example Input: Sentence: 'adult man on grassy field playing disc game'. Replace the letter 'n' with 'l' in the sentence.
Example Output: adult mal ol grassy field playilg disc game

Example Input: Sentence: 'a motorcycle that is in front of a car'. Replace the letter 'r' with 'p' in the sentence.
Example Output: a motopcycle that is in fpont of a cap

Example Input: Sentence: 'a pizza on a metal pizza pan on a table'. Replace the letter 'o' with 'z' in the sentence.
Example Output:
a pizza zn a metal pizza pan zn a table