#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  ll a,b;
  cin >> a >> b;
  if(a*5<b*18) cout << "blackyuki\n";
  else if(a*5>b*18) cout << "KoD\n";
  else cout << "same\n";
  return 0;
}