#include <iostream>
using namespace std;
int main(void){
    double a, b;
    cin >> a >> b;
    a /= 3.6;
    if (a>b) {
        cout << "KoD" << endl;
    }
    else if (a<b) {
        cout << "blackyuki" << endl;
    }
    else if (a==b) {
        cout << "same" << endl;
    }
}