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

Input: Consider Input: Sentence: 'a metal bowl filled with lots of red apples'. Replace the letter 'b' with 'x' in the sentence.

Output: a metal xowl filled with lots of red apples

Input: Consider Input: Sentence: 'a couple of giraffe standing next to each other'. Replace the letter 't' with 'c' in the sentence.

Output: a couple of giraffe scanding nexc co each ocher

Input: Consider Input: Sentence: 'there are three whine glasses and four bottles of whine'. Replace the letter 'w' with 'b' in the sentence.
Output: there are three bhine glasses and four bottles of bhine