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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	int n,k; string s; cin>>n>>k>>s;
	s=s.substr(k-1)+s.substr(0,k-1);
	if(n%2==k%2)reverse(s.end()-k+1,s.end());
	cout<<s<<"\n"s;
}