#include <bits/stdc++.h>
using namespace std;
int main() {
	int a;
	cin>>a;
	if(a>=86) {
		cout<<"VERY GOOD";
	}else cout<<"";
	if(85<=a>=60) {
		cout<<"GOOD";
	}else cout<<"";
	if(a<60) {
		cout<<"BAD";
	}else cout<<"";
}
/**************************************************************
	Problem: 1035
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/