#!/usr/bin/env python3
import itertools

def solve(n: int, k: int, s: str) -> str:
    # for i in range(n - k + 1):
    #     s = s[:i] + ''.join(reversed(s[i:i+k])) + s[i+k:]
    # return s
    if (n - k + 1) % 2 == 1:
        return s[k-1:] + ''.join(reversed(s[:k-1]))
    else:
        return s[k-1:] + s[:k-1]

# generated by online-judge-template-generator (https://github.com/kmyk/online-judge-template-generator)
def main():
    N, K = map(int, input().split())
    S = input()
    ans = solve(N, K, S)
    print(ans)

if __name__ == '__main__':
    main()