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

Input: Consider Input: Sentence: 'a small train is on the tracks by a house'. Replace the letter 'l' with 'x' in the sentence.

Output: a smaxx train is on the tracks by a house


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: 'young men at a skateboard park and one of them is making a jump'. Replace the letter 't' with 'm' in the sentence.


Output: young men am a skameboard park and one of mhem is making a jump