#include <bits/stdc++.h>
using namespace std;
int main(){
    long long a,b;
    cin>>a>>b;
    if((a*1000)>(b*60*60)) cout<<"KoD"<<endl;
    else if((a*1000)<(b*60*60)) cout<<"blackyuki"<<endl;
    else cout<<"same"<<endl;
}