#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, k;
    cin >> n >> k;
    string s;
    cin >> s;
    for (int i = 0; i < n - k + 1; i++)
    {
        //cout << i << endl;
        string s_f, s_m, s_b;
        s_f = s.substr(0, i);
        s_m = s.substr(i, k);
        s_b = s.substr(i + k, n - i - k);
        reverse(s_m.begin(), s_m.end());
        s = s_f + s_m + s_b;

        //cout << s_f << ":" << s_m << ":" << s_b << endl;
        //cout << s << endl;
    }

    cout << s << endl;
}