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<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<p>The yellow box should be in the top right corner of the hotpink box.</p>
<div style="width:30em; height:30em; background:hotpink;">
<div style="float:right; writing-mode:vertical-rl; background:yellow;">
<div style="visibility:hidden;">
Roses are red,<br>
violets are blue.<br>
All my base<br>
are belong to you.<br>
</div>
</div>
</div>
</div>