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>

int main(){
  int n,l,taste[200],min;
  
  scanf("%d%d",&n,&l);
   for(int i=0;i<n;i++){
     taste[i] = l+i-1;
     if(taste[i]<0) taste[i]=taste[i]*(-1);
   }
 
  min=0;
  for(int k=0;k<n;k++){

       if (taste[k]<min){
                min = taste[k]; 
                 }

         }

  printf("%d",min);

return 0;
}