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

Input: Consider Input: Sentence: 'people wait for a train on a snowy sidewalk'. Replace the letter 'n' with 'm' in the sentence.

Output: people wait for a traim om a smowy sidewalk


Input: Consider Input: Sentence: 'a group of people riding skis on a snowy surface'. Replace the letter 'p' with 'i' in the sentence.

Output: a groui of ieoile riding skis on a snowy surface


Input: Consider Input: Sentence: 'a cowboy gallops in the morning next to ocean'. Replace the letter 'o' with 'j' in the sentence.


Output: a cjwbjy galljps in the mjrning next tj jcean