5和8可以组成的六位数密码有:555558,555588,5555888,555888,558888,588888,888885,888855,888555,885555,855555,585858,858585,585885,858558,588585,855858,558558,885885,555858,888585,558558,885885,588885,855558,558885,885558,555885,888558等等。