p02993 AtCoder Beginner Contest 131 - Security
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`.

Examples

Input

3776


Output

Bad


Input

8080


Output

Good


Input

1333


Output

Bad


Input

0024


Output

Bad
```python
S=input()
for i in range(3):
  if S[i]==S[i+1]:
    print('Bad')
    exit(0)
print('Good')
```