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: Wrong Answer)

import java.util.*;

public class Main{
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);

      int s=sc.nextInt();
      int x,y,z,w;

        z=s%10;

        if(10<=s){
          y=(s-z)%100/10;
        }
        else{
          y=0;
        }

        if(100<=s){
          x=(s-10*y-z)%1000/100;
        }
        else{
          x=0;
        }

        if(1000<=s){
          w=(s-100*x-10*y-z)%10000/1000;
        }
        else{
          w=0;
        }
///////////////////////////////////////////////////////////
        if(x==y || y==z || z==w || (x==y&&y==z) || (y==z&&z==w) || (x==y&&y==z&&z==w)){
          System.out.println("Bad");
        }
        else{
          System.out.println("Good");
        }
///////////////////////////////////////////////////////////



    }
}