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

Input: Consider Input: Sentence: 'vita mix blender with something in it already blended'. Replace the letter 'b' with 'a' in the sentence.

Output: vita mix alender with something in it already alended


Input: Consider Input: Sentence: 'a tower type building structure with a large clock and many windows in front of a cloudy blue sky'. Replace the letter 'n' with 'x' in the sentence.

Output: a tower type buildixg structure with a large clock axd maxy wixdows ix froxt of a cloudy blue sky


Input: Consider Input: Sentence: 'a bunch of boats are sitting in a harbor'. Replace the letter 'o' with 'z' in the sentence.


Output: a bunch zf bzats are sitting in a harbzr