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 (Clang 3.8.0) (judge verdict: Accepted)

#include <iostream>

using namespace std;

int main()
{
	string s;

	cin >> s;

	bool isgood = true;
	if (s[0] == s[1])
		isgood = false;
	if (s[1] == s[2])
		isgood = false;
	if (s[2] == s[3])
		isgood = false;

	if (isgood) {
		cout << "Good" << endl;
	}
	else {
		cout << "Bad" << endl;
	}

}