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

long long a, b;

int main() {
	cin >> a >> b;

	a *= 5;
	b *= 18;

	if (a > b)
		cout << "Kod" << endl;
	else if (a < b)
		cout << "blackyuki" << endl;
	else
		cout << "same" << endl;
}