#!/usr/bin/env python3
import sys
MOD = 998244353

def main():
    N, K = map(int, input().split())
    S = input()
    if (N - K + 1) % 2 == 0:
        S = S[(K-1):] + S[:(K- 1)]
    else:
        S = S[(K-1):] + S[:(K- 1)][::-1]
    print(S)
    return

if __name__ == '__main__':
    main()