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

Input: Consider Input: Sentence: 'a large clock on the top of pole in the middle of a walk way'. Replace the letter 'f' with 'h' in the sentence.

Output: a large clock on the top oh pole in the middle oh a walk way


Input: Consider Input: Sentence: 'a man sitting in a chair with a laptop in his lap'. Replace the letter 'p' with 'v' in the sentence.

Output: a man sitting in a chair with a lavtov in his lav


Input: Consider Input: Sentence: 'a black dog chews a teddy bear on the floor'. Replace the letter 'f' with 'v' in the sentence.


Output: a black dog chews a teddy bear on the vloor