#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<math.h>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<double,double>
#define LP pair<ll,ll>
using namespace std;
int main() {
	double a, b,c;
	cin >>a>>b;
	c =  1000 *a/ 3600;
	if (c > b) cout << "KoD" << endl;
	else if (c == b) cout << "same" << endl;
	else cout << "blackyuki" << endl;
	return 0;
}