#include <bits/stdc++.h>
using namespace std;
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	long long A, B; cin >> A >> B;
	if(5 * A > 18 * B) cout << "KoD\n";
	else if(5 * A < 18 * B) cout << "blackyuki\n";
	else cout << "same\n";
}