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

Input: Consider Input: Sentence: 'a mobile phone and a set of keys on a key chain'. Replace the letter 's' with 'j' in the sentence.

Output: a mobile phone and a jet of keyj on a key chain


Input: Consider Input: Sentence: 'a single person is working in the cluttered kitchen'. Replace the letter 'n' with 'e' in the sentence.

Output: a siegle persoe is workieg ie the cluttered kitchee


Input: Consider Input: Sentence: 'a young boy standing in front of a refrigerator'. Replace the letter 'o' with 's' in the sentence.


Output: a ysung bsy standing in frsnt sf a refrigeratsr