题解 | #密码验证合格程序#

while True:
    try:
        s = str(input())
        flag = "OK"
        for i in range(len(s)-3):
            sub_str = s[i:i+3]
            if len(s.split(sub_str)) > 2:
                flag = "NG"
        if len(s) <= 8:
            flag = "NG"
        a,b,c,d =0,0,0,0
        for i in s:
            if i.isupper():
                a = 1
            elif i.islower():
                b = 1
            elif i.isdigit():
                c = 1
            else:
                d = 1
        if a+b+c+d < 3:
            flag = "NG"
        print(flag)
    except:
        break