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

int main()
{
	long long A, B;
	cin >> A >> B;

	A *= 1000;
	B *= 60 * 60;
	string ans = "same";
	if( A > B ) ans = "KoD";
	if( A < B ) ans = "blackyuki";

	cout << ans << endl;
}