题解 | #密码验证合格程序#

val = 0
while True:
    try:
        passwords = input().split()
        for str in passwords:
            if len(str) <= 8:
                print("NG")
                break 
            a,b,c,d = 0,0,0,0
            for s in str:
                if 'a'<=s<='z': a=1
                elif 'A'<=s<='Z': b=1
                elif '0'<=s<='9': c=1
                else: d=1
            if a+b+c+d < 3:
                print('NG')
            else:
                for i in range(len(str)):
                    if str[i:i+3] in str[i+3:]:
                        print('NG')
                        break
                else:print('OK')


    except:
        break