import re

string = input()

if (
        len(string) < 10 or
        ("kaspersky" in string.lower()) or
        len(set(list(string))) <= 5 or
        re.search('\d+', string) is False or
        re.search('[a-z]+', string) is False or
        re.search('[A-Z]+', string) is False or
        re.search("[,.?:;!\"\"()]+", string) is False
                  ):
    print("BAD")
else:
    print("GOOD")