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<hr size="1"><p class="copyright">Copyright &copy; 2002-2003 David Abrahams<br>Copyright &copy; 2002-2003 Joel de Guzman<br><br>

<font size="2">Permission to copy, use, modify, sell and distribute this document

 is granted provided this copyright notice appears in all copies. This document

 is provided &quot;as is&quot; without express or implied warranty, and with

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