#include <iostream>
using namespace std;
int main(){
    long long a,b;cin>>a>>b;
    if(a*10 < b*36){
        cout << "blackyuki" << endl;
    }else if(a*10 == b*36){
        cout << "same" << endl;
    }else{
        cout << "KoD" << endl;
    }
}