题解 | #密码验证合格程序#

while True:
    try:
        s = input()
        ng = 0
        ok = 0
        # 密码要求
        if len(s) < 8:
            ng += 1
        # 至少三种
        a, b, c, d = 0, 0, 0, 0
        for i in s:
            if i.isupper():
                a = 1
            if i.islower():
                b = 1
            if i.isdigit():
                c = 1
            if i.isascii():
                d = 1
        else:
            if a + b + c + d < 3:
                ng += 1
        # 不能由长度大于2的字串重复
        for i in range(len(s)-2):
            j = s[i:i + 3]
            m = s.count(j)
            if m > 1:
                ng += 1
        if ng > 0:
            print("NG")
        else:
            print("OK")
    except:
        break