{% assign splitprefix = include.prefix | split: "/" %}
{% assign l = splitprefix[0] %}
{% for page in site.pages | sort: 'path' %}
  {% if page.path contains include.prefix %}
    <li
      class="lessons-toc__list-item">
      <a 
        class="lessons-toc__anchor"
        href="{{page.path | replace: '.md','' | remove_first: l | remove_first: "/"}}">
        <h3
          class="lessons-toc__link-text">
          <span
            class="lessons-toc__numbering">+</span>
          <span
            class=