// C++ Program to find sum of Fibonacci numbers in 
// O(Log n) time.
#include <bits/stdc++.h>
using namespace std;
const int MAX = 1000;


// Driver program to test above function
int main()
{
	int n;
	cin>>n;
	if(n<1200)
		cout<<"green\n";
	else
		cout<<"difficult\n";
}