#include <iostream>
using namespace std;

int main(){
    int n, m;
    cin >> n >> m;
    if((n * (1000/3600.0)) < m){
        cout << "blackyuki" << endl;
    }else if((n * (1000/3600.0)) > m)
        cout << "KoD" << endl;
    else cout << "same" << endl;
}