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 PyPy3 (2.4.0) (judge verdict: Wrong Answer)

def main():
    s = input()
    num = list(s)
    list_num = [int(s) for s in num]

    temp = 0
    flag = False

    for i in list_num:
        if i == temp:
            print('Bad')
            flag = True
            break
        temp = i

    if flag == False:
        print('Good')

if __name__ == '__main__':
    main()