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

Input: Consider Input: Sentence: 'a zebra patterned set of hair brushes sitting on each other'. Replace the letter 'r' with 'a' in the sentence.

Output: a zebaa patteaned set of haia baushes sitting on each othea


Input: Consider Input: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.

Output: some brown blnck nnd white horses clouds nnd rocks


Input: Consider Input: Sentence: 'a black and white photograph of a train'. Replace the letter 'h' with 'o' in the sentence.


Output: a black and woite pootograpo of a train