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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<style>
h3 {
column-span: all;
}
html {
columns: 3em;
}
</style>
<body onload=go()>
<h3></h3>
<!-- The following content will be in a -moz-column-content frame where it's
parent is a hard continuation of a nsColumnSetFrame. -->
ltr
ltr
<div dir="rtl">rtl</div>
<div></div>
</body>
</html>