所有中心对称五字母域名生成，扫了一下，com的基本上都被注册了。。。

public static void main(String[] args) {
        String[] letter = new String[]{"i","m","o","u","v","w","x"};
        //AHiImMoOTuUvVwWxXY        
        for (int i = 0; i < letter.length; i++) {
            for (int j = 0; j < letter.length; j++) {
                for (int k = 0; k < letter.length; k++) {
                    String ret = "";
                    ret = ret + letter[i] + letter[j] + letter[k] + letter[j] + letter[i];
                    System.out.println("\"" + ret + "\",");
                }
            }
        }
    }