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 (GCC 5.4.1) (judge verdict: Runtime Error)

#include<stdio.h>

void main(){
    int code;
    int a[4];
    int h = 0;
    scanf("%d",&code);
    
        a[0] = (code % 10); 
        code = (code - (code % 10)) / 10;
        a[1] = (code % 10); 
        code = (code - (code % 10)) / 10;
        a[2] = (code % 10); 
        code = (code - (code % 10)) / 10;
        a[3] = (code % 10); 
        if(a[0]!=a[1] && a[1]!=a[2] && a[2]!=a[3]){
            printf("Good\n");
        }else{
            printf("Bad\n");
        }
    
}