题解 | #密码验证合格程序#

def f1(x1):
    if len(x1) > 8:
        return True
    return False

def f2(x2):
    up = 0
    lw = 0
    num = 0
    ot = 0
    for i in x2:
        if i.isupper():
            up += 1
        elif i.islower():
            lw += 1
        elif i.isdigit():
            num += 1
        else:
            ot += 1
    if (up != 0 and lw != 0 and num != 0 and ot == 0) or (up != 0 and lw != 0 and ot != 0 and num == 0) or (up != 0 and num != 0 and ot != 0 and lw == 0) or (lw != 0 and num != 0 and ot != 0 and up == 0) or (lw != 0 and num != 0 and ot != 0 and up != 0):
        return True
    return False

def f3(x3):
    for i in range(len(x3)):
        #for j in range(i+1,len(x3)):
        if x3[i:i+3] in x3[i+3:]:
            return False
    return True

        
    

while True:
    try:
        s = input()
       
        if f1(s) and f2(s) and f3(s):
            print('OK')
        else:
            print('NG')
    except:
        break