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

Example Input: Sentence: 'a plate topped with a bacon and broccoli salad'. Replace the letter 'o' with 't' in the sentence.
Example Output: a plate ttpped with a bactn and brtcctli salad

Example Input: Sentence: 'a group of people walking along a dirty snow covered road'. Replace the letter 'n' with 'i' in the sentence.
Example Output: a group of people walkiig aloig a dirty siow covered road

Example Input: Sentence: 'a black plate with an uncut cake and a server'. Replace the letter 'c' with 'd' in the sentence.
Example Output:
a bladk plate with an undut dake and a server