#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
typedef long long ll;
using namespace std;

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

    ll A, B;
    cin >> A >> B;
    A *= 1000;
    B *= 3600;

    if (A == B)
        cout << "same";
    else if (A > B)
        cout << "KoD";
    else
        cout << "blackyuki";
    cout << "\n";

    return 0;
}