#include <iostream>
#include <string>
using namespace std;
int main()
{
    int A, B;
    cin >> A >> B;
    if (A * 1000 > B * 60 * 60)
    {
        cout << "KoD" << endl;
        return 0;
    }
    if (A * 1000 < B * 60 * 60)
    {
        cout << "blackyuki" << endl;
        return 0;
    }
    if (A * 1000 == B * 60 * 60)
    {
        cout << "same" << endl;
        return 0;
    }
}