#include <atcoder/all>
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
#define rep(i,a,n) for (int i = a; i < (n); i++)
template<typename T> inline bool chmax(T& a, T b) { return ((a < b) ? (a = b, true) : (false)); }
template<typename T> inline bool chmin(T& a, T b) { return ((a > b) ? (a = b, true) : (false)); }

int main() {
    int n;
    cin >> n;
    if(n<1200) cout << "green\n";
    else cout << "difficult\n";
}