#235. everyNth

everyNth

Background

Description

Given a non-empty string and an int N, return the string made starting with char 0, and then every Nth char of the string. So if N is 3, use char 0, 3, 6, ... and so on. N is 1 or more.

Format

Input

Output

Samples

Miracle" 
"Mrce"
abcdefg" 
"aceg"
abcdefg" 
"adg"

Limitation

1s, 1024KiB for each test case.