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

Input: Consider Input: Sentence: 'a couple of giraffe standing next to each other in a forest'. Replace the letter 'a' with 'w' in the sentence.

Output: w couple of girwffe stwnding next to ewch other in w forest


Input: Consider Input: Sentence: 'the kitchen has a big screen tv and a lot of counter space'. Replace the letter 'h' with 'z' in the sentence.

Output: tze kitczen zas a big screen tv and a lot of counter space


Input: Consider Input: Sentence: 'a man wearing a yellow hard hat trying to hit a ball with a tennis racket'. Replace the letter 'n' with 'r' in the sentence.


Output: a mar wearirg a yellow hard hat tryirg to hit a ball with a terris racket