public static BST<Morse> ler() throws FileNotFoundException, UnsupportedEncodingException, IOException {
        MorseTree mt = new MorseTree();
        BST<Morse> bst = mt.getBst();
        bst.insert(new Morse("Start", " ", null));
        File fileDir = new File(file_name);
        BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(fileDir), "UTF8"));
        lerTotal(in, bst);
        in.close();
        return bst;
    }

    public static void lerTotal(BufferedReader in, BST<Morse> bst) throws IOException {
        String str;
        while ((str = in.readLine()) != null) {
            String tmp[] = str.split(" ");
            Morse m = new Morse(tmp[0], tmp[1], tmp[2]);
            bst.insert(m);
        }
    }