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

Example Input: Sentence: 'a white plate topped with a cut in half sandwich'. Replace the letter 'o' with 'x' in the sentence.
Example Output: a white plate txpped with a cut in half sandwich

Example Input: Sentence: 'a white kitchen with bottles and pots on the counter'. Replace the letter 'a' with 'p' in the sentence.
Example Output: p white kitchen with bottles pnd pots on the counter

Example Input: Sentence: 'tennis players are playing on a bright blue court'. Replace the letter 'i' with 'y' in the sentence.
Example Output:
tennys players are playyng on a bryght blue court