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){
	var array = [];
	var difficultFlag = 0;
	for(var i = 0; i<2;i++){	
		array.push(input.slice(i,i+3));
      	if(array[0] == array[1] || array[1] == array[2]){
        	difficultFlag = 1; 
        }
    }
  	if(difficultFlag == 1){
     console.log('Bad'); 
    }else{
     console.log('Good'); 
    }

}



Main(require("fs").readFileSync("/dev/stdin", "utf8"));