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

Example Input: Sentence: 'there is a piece of a cake on the plate and a cup of drink'. Replace the letter 'r' with 'u' in the sentence.
Example Output: theue is a piece of a cake on the plate and a cup of duink

Example Input: Sentence: 'a person holding a small remote key chain'. Replace the letter 'n' with 'j' in the sentence.
Example Output: a persoj holdijg a small remote key chaij

Example Input: Sentence: 'a beer pub is included in a road sign'. Replace the letter 'd' with 's' in the sentence.
Example Output:
a beer pub is incluses in a roas sign