#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
    ll a,b;
    cin>>a>>b;
    a*=1000;
    b*=3600;
    if(a==b){
        cout<<"same"<<endl;
    }else if(a>b){
        cout<<"koD"<<endl;
    }else{
        cout<<"blackyuki"<<endl;
    }
}