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 (Clang 3.8.0) (judge verdict: Accepted)

#include<stdio.h>

int main(){
	int cord[4];
	int in;

	scanf("%d",&in);
  	cord[0]=in/1000;
	in=in-cord[0]*1000;
	cord[1]=in/100;
	in=in-cord[1]*100;
	cord[2]=in/10;
	in=in-cord[2]*10;
	cord[3]=in/1;
	in=in-cord[3]*1;
	if((cord[0]==cord[1])||(cord[1]==cord[2])||(cord[2]==cord[3])){
	printf("Bad\n");
    }
	else
    {
	printf("Good\n");
    }
	return 0;
}