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<!DOCTYPE html> <html> <head> <style> ol { counter-reset: section; list-style-type: none; } li::before { counter-increment: section; content: counters(section,".") " "; } </style> </head> <body> <ol> <li>item</li> <li>item <ol> <li>item</li> <li>item</li> <li>item <ol> <li>item</li> <li>item</li> <li>item</li> </ol> </li> <li>item</li> </ol> </li> <li>item</li> <li>item</li> </ol> <ol> <li>item</li> <li>item</li> </ol> <p><b>Note:</b> IE8 supports these properties only if a !DOCTYPE is specified.</p> </body> </html>