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

Input: Consider Input: Sentence: 'traffic congestion with cars and an electric tram'. Replace the letter 'a' with 'k' in the sentence.

Output: trkffic congestion with ckrs knd kn electric trkm


Input: Consider Input: Sentence: 'three men playing in a men's doubles tennis match'. Replace the letter 'e' with 'l' in the sentence.

Output: thrll mln playing in a mln's doublls tlnnis match


Input: Consider Input: Sentence: 'a red stop sign sitting on the side of a road'. Replace the letter 's' with 'y' in the sentence.


Output: a red ytop yign yitting on the yide of a road