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

Input: Consider Input: Sentence: 'commuter trains on tracks next to paved platform'. Replace the letter 'm' with 'w' in the sentence.

Output: cowwuter trains on tracks next to paved platforw


Input: Consider Input: Sentence: 'bags of seeds with a pair of black scissors sitting on them'. Replace the letter 'b' with 'y' in the sentence.

Output: yags of seeds with a pair of ylack scissors sitting on them


Input: Consider Input: Sentence: 'a black bird standing on a wooden frame'. Replace the letter 'c' with 'n' in the sentence.


Output: a blank bird standing on a wooden frame