public String tokenify(final String text) {
        final StringBuilder strBuilder = new StringBuilder();
        for (int i = 0; i < text.length(); i++) {
            final char c = text.charAt(i);
            if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) {
                strBuilder.append(c);
            }
        }
        return strBuilder.toString();
    }