#include <bits/stdc++.h>
#define rep(i, n) for(int i= 0; i < (n); i++)
using ll= long long int;
using namespace std;
ll mod= 1e9 + 7;



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