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

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 dog drinking out of a bowl of water'. Replace the letter 'w' with 'k' in the sentence.
Example Output: a dog drinking out of a bokl of kater

Example Input: Sentence: 'there are four people playing a video game'. Replace the letter 'e' with 'j' in the sentence.
Example Output:
thjrj arj four pjoplj playing a vidjo gamj