Problem:
Score : 100 points

Problem Statement

The door of Snuke's laboratory is locked with a security code.

The security code is a 4-digit number. We say the security code is hard to enter when it contains two consecutive digits that are the same.

You are given the current security code S. If S is hard to enter, print Bad; otherwise, print Good.

Constraints

S is a 4-character string consisting of digits.

Input

Input is given from Standard Input in the following format:

S

Output

If S is hard to enter, print Bad; otherwise, print Good.

Sample Input 1

3776

Sample Output 1

Bad

The second and third digits are the same, so 3776 is hard to enter.

Sample Input 2

8080

Sample Output 2

Good

There are no two consecutive digits that are the same, so 8080 is not hard to enter.

Sample Input 3

1333

Sample Output 3

Bad

Sample Input 4

0024

Sample Output 4

Bad

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<iostream>
#include<string>
#include<sstream>
using namespace std;

int main(){
	string num;
	while(getline(cin,num)){
		int x,a,b;
		stringstream ss;
		ss<<num;
		ss>>x;
		while(ss>>x){
			a=x/1000;
			b=(x%1000)/100;
			if(a==b){
				cout<<"Bad"<<"\n";
				break;
			}
			else{
				a=(x%100)/10;
				if(b==a){
					cout<<"Bad"<<"\n";
					break;
				} 
				else{
					b=x%10;
					if(a==b){
						cout<<"Bad"<<"\n";
						break;
					} 
					else{
						cout<<"Good"<<"\n";
						continue;
					}
				}
			}
		}
	}
	return 0;		
}