                              <code>*</code> Any letter or number.<br>
                                    <code>?</code> Make any part of the mask optional.
                                </span>
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="col-sm-3">Predefined masks:</label>

                            <div class="col-sm-9">
                                <p>
                                