#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define REP(i, x, y) for (auto i = (x); i < (y); i++)
#define RREP(i, x, y) for (auto i = (y) - 1; (x) <= i; i--)
#define ALL(x) (x).begin(), (x).end()
#pragma GCC optimize("O3")
#include <atcoder/fenwicktree>
#include <atcoder/segtree>
#include <atcoder/lazysegtree>
#include <atcoder/string>
#include <atcoder/math>
#include <atcoder/convolution>
#include <atcoder/modint>
#include <atcoder/dsu>
#include <atcoder/maxflow>
#include <atcoder/mincostflow>
#include <atcoder/scc>
#include <atcoder/twosat>
using namespace atcoder;
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin >> N;
  if(N < 1200){
  	cout << "green\n";
  }else{
  	cout << "difficult\n";
  }
  return 0;
}