#include <iostream> #include <string> #include <vector> #include <algorithm> #include <utility> using namespace std; typedef long long ll; #define rep(i, n) for (int i=0;i < (int)(n);i++) int main(){ int n,k; cin >> n >> k; string s; cin >> s; for (int i=k-1;i <n;i++){ cout << s[i]; } if ((n-k+1)%2 == 1){ for (int i=k-2;i >= 0;i--){ cout << s[i]; } }else{ rep(i,k-1){ cout << s[i]; } } cout << endl; return 0; }