<!DOCTYPE html>
<link rel="stylesheet" href="test-common.css">
<style type="text/css">
  @counter-style a {
    system: alphabetic;
    suffix: ":";
  }
  @counter-style b {
    system: alphabetic;
    symbols: A;
    suffix: ":";
  }
</style>
<ol start="-2" style="list-style-type: a">
  <li>foo<li>bar<li>foo<li>bar
</ol>
<ol start="-2" style="list-style-type: b">
  <li>foo<li>bar<li>foo<li>bar
</ol>