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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