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: Runtime Error)


import java.util.*;

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

        int A = sc.nextInt();

        String k = Integer.toString(A);

        String a = k.substring(0,0);
        String b = k.substring(1,1);
        String c = k.substring(2,2);
        String d = k.substring(3,3);

        Boolean g;

        if(a.equals(b)){
            g = true;
        }else if(b.equals(c)){
            g = true;
        }else if(c.equals(d)){
            g = true;
        }else{
            g = false;
        }

        if(g){
            System.out.println("Bad");
        }else{
            System.out.println("Good");
        }


    }
}