              <label for="r_{{c}}_{{i}}" class="custom-control-label">{{ i }}</label>
                      </div>
                      {% endfor %}
                    </div>
                </div>
                {% endfor %}

                <input type="submit" class="btn btn-lg btn-primary btn-block" value="{{ "提交验证" | shuffle(shuffle_mode=shuffle_mode) }}" />
                {% if shuffle_mode: %}
                    <a class="btn btn-lg btn-danger btn-block" href="/">{{ "退出 SHUFFLE 翻�