#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include <iomanip>
using namespace std;

int main(){
    long long a, b;
    cin >> a >> b;
    cout << ((a*1000 == b*60*60) ? "same" : ((a*1000 > b*60*60) ? "KoD" : "blackyuki")) << endl;
}