#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  int n, k;
  cin >> n >> k;
  string s;
  cin >> s;
  if ((n-k+1)%2==0) {
    for (int i = k-1; i < s.size(); i++) {
      cout << s[i];
    }
    rep(i,k-1) cout << s[i];
    cout << endl;
  } else {
    for (int i = k-1; i < s.size(); i++) {
      cout << s[i];
    }
    rep(i,k-1) cout << s[k-2-i];
    cout << endl;
  }
  


}