#include <iostream>
using namespace std;

int main(){
    int a, b;
    cin >> a  >> b;
    b = b * 360 / 1000;
    if (a>b){
        cout << "KoD";
    }else if(a == b){
        cout << "same";
    }else{
        cout << "blackyuki";
    }
    return 0;
}