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

Input: Consider Input: Sentence: 'a person is standing in the snow in skis'. Replace the letter 'g' with 'x' in the sentence.

Output: a person is standinx in the snow in skis


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: 'a boy wearing a green shirt doing a trick on a skateboard'. Replace the letter 'a' with 'f' in the sentence.


Output: f boy wefring f green shirt doing f trick on f skftebofrd