<!DOCTYPE html> <link rel="stylesheet" href="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>