l.

<table class="test">
  <col span=2 class="navy">
  <col class="blue">
  <col span=2 class="aqua">
  <tr><td><td><td><td><td>
</table>
<table class="test">
  <colgroup span=2 class="navy"></colgroup>
  <colgroup>
    <col class="blue">
    <col span=2 class="aqua">
  </colgroup>
  <tr><td><td><td><td><td>
</table>

<table dir=rtl class="test">
  <col span=2 class="aqua">
  <col class="blue">
  <col span=2 class="navy">
  <tr><td><td><td><td><td>
</table>
<table dir=rtl class="test">
  <colgroup span=2 cl