#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
#include <atcoder/modint>
#include <atcoder/dsu>
#include <boost/rational.hpp>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
const double pi = 3.14159265359879323846264338327950288419;
const ll INF = 9 * 1e18;
using p = pair<ll, ll>;

int main() {
  int n; cin >> n;
  cout << (n < 1200 ? "green":"difficult") << endl;
}