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

int main() {
    int A,B;
    cin >> A >> B;
    double C = 3.6 * B;
    if((double)A > C) cout << "KoD" << endl;
    else if((double)A < C) cout << "blackyuki" << endl;
    else cout << "same" << endl;
    return 0;
}