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

Input: Consider Input: Sentence: 'a table full of various types of cellphones, pdas and pagers'. Replace the letter 's' with 'f' in the sentence.

Output: a table full of variouf typef of cellphonef, pdaf and pagerf


Input: Consider Input: Sentence: 'a baseball player swings his bat at a pitch'. Replace the letter 's' with 'l' in the sentence.

Output: a baleball player lwingl hil bat at a pitch


Input: Consider Input: Sentence: 'a ski boarder that is laying down on a snowy hill'. Replace the letter 's' with 'c' in the sentence.


Output: a cki boarder that ic laying down on a cnowy hill