<!DOCTYPE html> <style type="text/css"> @counter-style a { system: extends decimal; suffix: ","; } @counter-style b { system: extends decimal; suffix: \3001; } ol { list-style-position: inside; } ol, section, p { padding: 0; margin: 0; line-height: 150%; } section { counter-reset: p -3; } p { counter-increment: p; } p::before { content: counter(p, a); } </style> <ol start="-2" style="list-style-type: a"> <li>-2<li>-1<li>0<li>1<li>2 </ol> <ol start="-2" style="list-style-type: b"> <li>-2<li>-1<li>0<li>1<li>2 </ol> <section> <p><p><p><p><p> </section>