on">
    <h2>{{ key }}</h2>
    <table class="indextable genindextable">
        <tr>
            {%- for column in entries|slice_index(2) if column %}
            <td>
                <ul>
                    {%- for entryname, (links, subitems, _) in column %}
                    <li>{{ indexentries(entryname, links) }}
                        {%- if subitems %}
                        <ul>
                            {%- for subentryname, subentrylinks in subitems %}
                            <li>{{ in