题解 | #密码验证合格程序#

def hegui(ss):
    res = set()
    for i in ss:
        if i.islower():
            res.add('lower')
        elif i.isupper():
            res.add('upper')
        elif i.isdigit():
            res.add('digit')
        else:
            res.add('other')
    return len(res)

def gongchr(ss):
    for i in range(len(ss) - 1):
        for j in range(i + 3, len(ss)+1):
            if ss.count(ss[i:j]) >= 2:
                return False
                break
    else:
        return True

while True:
    try:
        s = input()
        if len(s) <= 8:
            print('NG')
        elif hegui(s) < 3:
            print('NG')
        elif not gongchr(s):
            print('NG')
        else:
            print('OK')
    except:
        break