="app">
                <h1>{{ "SHUFFLE VAULT" | shuffle(shuffle_mode=shuffle_mode) }}</h1>
                <img src="{{ "captcha_shuffled.bmp" if shuffle_mode else "captcha.bmp" }}">
                <div class="alert alert-info" role="alert">
                    {{ "通知：为了网站更加人性化，近期我们对交互方式进行了改进，没有键盘的用户也能准确输入验证码。" | shuffle(shuffle_mode=shuffle_mode) }}
                </div>
                {% for c in alphabet %}
    