#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    double a, b;
    cin >> a >> b;
    if (a / 3.6 > b) cout << "KoD\n";
    else if (a / 3.6 == b) cout << "same\n";
    else cout << "blackyuki\n";
    return 0;
}