\documentclass{ppex}
\nonstopmode
\usepackage [all,poly]{xy}
\pagestyle{empty}
\setlength\textwidth{183.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage [all,poly]{xy}
\[\begin{xy} /r10mm/:
,   0    ,{\xypolygon6{}}
,+/r22mm/,{\xypolygon6{@{o}}}
,+/r22mm/,{*@{o}\xypolygon6{@{*}}}
\end{xy}\]
\end{document}

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