#include <bits/stdc++.h>
#include <bits/extc++.h>
using i64 = long long;
void solve()
{
    int n;
    std::cin >> n;
    if (n < 1200)
    {
        std::cout << "green\n";
    }
    else
    {
        std::cout << "difficult\n";
    }
}
int main()
{
    std::cin.tie(nullptr)->sync_with_stdio(false);
    solve();
    return 0;
}