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

    int main(){

        double a,b;
       cin >> a >> b;
       double c;
       c = a*1000/3600;
       if(c>b){
        cout << "KoD" << endl;
       }
       else if(c == b){

        cout << "same" << endl;



       }

        else{
        cout << "blackyuki" << endl;
       }

      

        
    }