10713: ABC131- A - Security
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Description
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`.
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`.
Input
Input is given from Standard Input in the following format:
```
$S$
```
```
$S$
```
Output
If $S$ is hard to enter, print `Bad`; otherwise, print `Good`.
Constraints
$S$ is a $4$-character string consisting of digits.
Sample 1 Input
3776
Sample 1 Output
Bad
The second and third digits are the same, so 3776 is hard to enter.
Sample 2 Input
8080
Sample 2 Output
Good
There are no two consecutive digits that are the same, so 8080 is not hard to enter.
Sample 3 Input
1333
Sample 3 Output
Bad
0024
Bad