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

Example Input: Sentence: 'a wooden bench near a tree and a stone wall'. Replace the letter 'l' with 'q' in the sentence.
Example Output: a wooden bench near a tree and a stone waqq

Example Input: Sentence: 'a man that is holding a remote to a game'. Replace the letter 'a' with 'z' in the sentence.
Example Output: z mzn thzt is holding z remote to z gzme

Example Input: Sentence: 'a man on a horse drawn wagon with another horse behind'. Replace the letter 's' with 'k' in the sentence.
Example Output:
a man on a horke drawn wagon with another horke behind