#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b;
  cin >> a >> b;
  b *= 3600;
  a *= 1000;
  if (a == b) cout << "same";
  else if (a > b) cout << "KoD";
  else cout << "blackyuki";
  cout << endl;
  return 0;
}