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 JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

function Main(input){
   	input = input;
  
  	var num = String(input);
    var j = 1;
  	var judge = 0;
  	var array = num.split('');
  
  		for(var i=0;i<3;i++){
			if(array[i] == array[j]){
        		judge++;
        	}
          	else{
    			j++;
            }
		}
  
  	if(judge == 0){
      console.log('good');
    }
    else{
      console.log('bad');
    }
}
 Main(require("fs").readFileSync("/dev/stdin","utf-8"));