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

Example Input: Sentence: 'a bride and a groom look ridiculous as they stuff cake into each other's mouth'. Replace the letter 'd' with 's' in the sentence.
Example Output: a brise ans a groom look risiculous as they stuff cake into each other's mouth

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 large black dog laying on a kitchen floor'. Replace the letter 'b' with 'k' in the sentence.
Example Output:
a large klack dog laying on a kitchen floor