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

int main()
{
    cin.tie(0)->sync_with_stdio(0);

    int A, B;
    cin >> A >> B;
    long a = (long)A * 1000;
    long b = (long)B * 60 * 60;
    cout << (a == b ? "same" : a > b ? "KoD"
                                     : "blackyuki")
         << endl;
}