题解 | #密码验证合格程序#

import re
while True:
    try:
        s = input()
        
        if len(s) <= 8:   # 1. 判断字符串长度
            print("NG")

        else:             # 2. 判断是否包括三种字符类型
            A_Z = False
            a_z = False
            num = False
            other = False
            for i in s:
                if re.match("[A-Z]", i):
                    A_Z = True
                elif re.match("[a-z]", i):
                    a_z = True
                elif re.match("[0-9]", i):
                    num = True
                else:
                    other = True
            if A_Z + a_z + num + other < 3:
                print("NG")
            else:          # 3. 判断子串重复
                repeat = False
                for i in range(len(s)-5):
                    for j in range(i+3,len(s)-2):
                        if s[i] == s[j] and s[i+1]==s[j+1] and s[i+2]==s[j+2]:
                            repeat = True
                            break
                if repeat:
                    print("NG")
                else:
                    print("OK")
    except:
        break