#include <bits/stdc++.h> 
using namespace std;
#include <ios>
#include <iomanip>
  
int main() {
  double c, b;
  cin >>c>>b;
  double a;
  a=c*1000/3600;
  if(a>b){
    cout <<"KoD";
  }
  else if(b>a){
    cout <<"blackyuki";
  }
  else{
    cout <<"same";
  }
}