#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin >> A >> B;
 
  if (A < (3.6*B)) {
    cout << "blackyuki" << endl;
  }
 
  else if (A ==(3.6*B)) {
    cout << "some" << endl;
  }
 
  else{
    cout << "KoD" << endl;
  }
}