#include<bits/stdc++.h>
using namespace std;
int main(){
	int i;
	cin>>i;
	if(i>85){
		cout<<"VERY GOOD";
	}
    if(i>59&&i<86){
		cout<<"GOOD";
	}
	if(i<60){
		cout<<"BAD";
	}
}

/**************************************************************
	Problem: 1035
	User: hongjiaming
	Language: C++
	Result: Accepted
	Time:27 ms
	Memory:2072 kb
****************************************************************/