d>

<grid title="Item col 2-3 + Item 5ch col 1-3">
  <item>1</item>
  <item>2 2</item>
  <item>3 3</item>
  <item>4</item>
  <item style="grid-column:2/span 2">5 5</item>
  <item style="width:5ch; grid-column:1/span 3">6</item>
</grid>

<grid title="Item 3ch col 2-3 + Item 5ch col 1-3">
  <item>1</item>
  <item>2 2</item>
  <item>3 3</item>
  <item>4</item>
  <item style="width:3ch; grid-column:2/span 2">5 5</item>
  <item style="width:5ch; grid-column:1/span 3">6</item>
</grid>

<grid title="Last item span