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

Input: Consider Input: Sentence: 'subway train approaching the platform of a subway station'. Replace the letter 'y' with 'c' in the sentence.

Output: subwac train approaching the platform of a subwac station


Input: Consider Input: Sentence: 'a clean, sterile bathroom with a shower, toilet, and sink'. Replace the letter 'n' with 'k' in the sentence.

Output: a cleak, sterile bathroom with a shower, toilet, akd sikk


Input: Consider Input: Sentence: 'two miniature ponies are eating grass from the other side of the fence'. Replace the letter 'f' with 'c' in the sentence.


Output: two miniature ponies are eating grass crom the other side oc the cence