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

Input: Consider Input: Sentence: 'a couch, footrest, tv and other furniture are arranged in a living room'. Replace the letter 'o' with 'g' in the sentence.

Output: a cguch, fggtrest, tv and gther furniture are arranged in a living rggm


Input: Consider Input: Sentence: 'a man in a baseball cap watching something in the air'. Replace the letter 'g' with 'o' in the sentence.

Output: a man in a baseball cap watchino somethino in the air


Input: Consider Input: Sentence: 'the people are riding motor cycles down the street'. Replace the letter 'r' with 'f' in the sentence.


Output: the people afe fiding motof cycles down the stfeet