{%- for year in filter.years %}
<input type="hidden" name="year" value="{{ year }}">
{%- endfor %}
{%- for language in filter.languages %}
<input type="hidden" name="language" value="{{ language }}">
{%- endfor %}
{%- for item_type in filter.types %}
<input type="hidden" name="type" value="{{ item_type }}">
{%- endfor %}
{%- for license in filter.licenses %}
<input type="hidden" name="license" value="{{ license }}">
{%- endfor %}
{%- if filter.featured %}
<input type="hidden" name="featured" value="1">
{%- endif %}
{%- if filter.pdf_keys.is_some() %}
<input type="hidden" name="content" value="pdf">
{%- endif %}