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

Input: Consider Input: Sentence: 'a mouse and keyboard sitting on a wooden desk'. Replace the letter 'a' with 'n' in the sentence.

Output: n mouse nnd keybonrd sitting on n wooden desk

Input: Consider Input: Sentence: 'a buddha statue sitting under a cat umbrella'. Replace the letter 'c' with 'h' in the sentence.

Output: a buddha statue sitting under a hat umbrella

Input: Consider Input: Sentence: 'a bunch of green bananas hanging from a tree'. Replace the letter 'a' with 'w' in the sentence.
Output: w bunch of green bwnwnws hwnging from w tree