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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String[] foo = sc.nextLine().split("");
      	int hoge[] = new int[4];
      	for(int i = 0; i < 4; i++) {
      		hoge[i] = Integer.parseInt(foo[i]);
      	}
      	int temp = -1;
      	String str = "Good";
      	for(int i = 0; i < 4; i++){
      		int nabe = hoge[i];
        	if(temp==nabe){
            	str = "Bad";
              	break;
            }
          	temp = nabe;
        }
      
      	System.out.println(str);
    }
}