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

Example Input: Sentence: 'a man eats food that is inside a banana peel'. Replace the letter 'n' with 'k' in the sentence.
Example Output: a mak eats food that is ikside a bakaka peel

Example Input: Sentence: 'a shot looks down on a person riding a long board'. Replace the letter 'o' with 'u' in the sentence.
Example Output: a shut luuks duwn un a persun riding a lung buard

Example Input: Sentence: 'a young boy playing with a toy kitchen'. Replace the letter 'b' with 'w' in the sentence.
Example Output:
a young woy playing with a toy kitchen