Background

Description

Given a string and an int n, return a string made of the first n characters of the string, followed by the first n-1 characters of the string, and so on. You may assume that n is between 0 and the length of the string, inclusive (i.e. n >= 0 and n <= str.length()).

Format

Input

Output

Samples

Chocolate" 

"ChocChoChC"

Chocolate" 

"ChoChC"

Ice Cream" 

"IcI"

Limitation

1s, 1024KiB for each test case.