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: 'a baseball player running on a baseball field'. Replace the letter 'e' with 'h' in the sentence.

Output: a bashball playhr running on a bashball fihld


Input: Consider Input: Sentence: 'a man falling off of a surfboard on top of a wave'. Replace the letter 'f' with 'j' in the sentence.


Output: a man jalling ojj oj a surjboard on top oj a wave