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

Input: Consider Input: Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.

Output: many stxeet signs in fxont of a building while it is snowing


Input: Consider Input: Sentence: 'a box of a dozen doughnuts all varieties'. Replace the letter 'l' with 'i' in the sentence.

Output: a box of a dozen doughnuts aii varieties


Input: Consider Input: Sentence: 'a man in a baseball uniform posing outside of miller park'. Replace the letter 's' with 'h' in the sentence.


Output: a man in a baheball uniform pohing outhide of miller park