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Test Info:

<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Test: descriptor range</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org/">
<link rel="match" href="descriptor-range-ref.html">
<link rel="stylesheet" href="support/test-common.css">
<style type="text/css">
@counter-style a {
system: extends upper-roman;
range: infinite -3, -1 2, 4 4, 7 9, 11 infinite;
}
</style>
<ol start="-3" style="list-style-type: a">
<li><li><li><li><li>
<li><li><li><li><li>
<li><li><li><li><li>
<li value="3999"><li>
</ol>