def checkio(good):
    hasup = ''
    hasdig = ''
    haslow = ''
    if 10 > len(good):
        return False

    for i in good:
        if i.islower():
            haslow = True
        elif i.isdigit():
            hasdig = True
        elif i.isupper():
            hasup = True

    return all((haslow,hasdig,hasup))
print(checkio('123456123456'))