#include <iostream>
using namespace std;
int main(void){
    int A,B;
    cin>>A>>B;
if(5*A<B*18){
    cout<<"blackyuki"<<endl;
}
else if(5*A>B*18){
    cout<<"KoD"<<endl;
}
else if(5*A==B*18){
    cout<<"same"<<endl;
}
}