def main():
    n, k = map(int, input().split())
    s = input()

    if (n - k) % 2:
        ans = s[k - 1:] + s[:k - 1]
    else:
        ans = s[k - 1:] + s[:k - 1][::-1]
    print(ans)


if __name__ == "__main__":
    main()