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

/**************************************************************
	Problem: 1035
	User: zhengzihao3
	Language: C++
	Result: Wrong Answer
****************************************************************/