#include <bits/stdc++.h> using namespace std; #define rep(i, n) for (int i = 0; i < (n); i++) #define rep1(i, n) for (int i = 1; i <= (n); i++) #define rrep(i, n) for (int i = n - 1; i >= 0; i--) #define rrep1(i, n) for (int i = n; i >= 1; i--) #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define eb emplace_back #define fi first #define se second #define sz(x) (int)(x).size() template <class T> using V = vector<T>; template <class T> using VV = V<V<T>>; typedef long long int ll; void speedUpIO() { cin.tie(nullptr); ios::sync_with_stdio(false); } template <class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; } template <class T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; } /*--------------------------------------------------*/ typedef pair<int, int> P; const int INF = 1e9; const ll LINF = 1e18; const int MX = 100010; bool solve() { int n; cin >> n; return n < 1200; } int main() { speedUpIO(); int t = 1; // cin >> t; while (t--) { // solve(); // cout << solve() << "\n"; cout << (solve() ? "green" : "difficult") << "\n"; // cout << fixed << setprecision(15) << solve() << "\n"; } return 0; }