\documentclass{article}
\usepackage{com.braju.graphicalmodels}

\catcode`\@=11%
\pagestyle{empty}

\begin{document}
\TeXtoEPS

\LARGE
\psset{unit=20mm,arrowscale=1.5,linewidth=1.5pt}
\begin{pspicture}(0,0)(10,7)%\showgrid
  \SpecialCoor
   \rput(1,1){\GM@node[observed=true]{a}}
   \rput(3,1){\GM@node[observed=true]{b}}
   \rput(5,1){\GM@node[observed=true]{c}}
   \rput(7,1){\GM@node[observed=true]{d}}
   \rput(2,3){\GM@node[observed=false]{e}}
   \rput(4,3){\GM@node[observed=false]{f}}
   \rput(6,3){\GM@node[observed=false]{g}}
  

   \ncline[arrows=-]{a}{e}
   \ncline[arrows=-]{a}{f}
   \ncline[arrows=-]{a}{g}

   \ncline[arrows=-]{b}{e}
   \ncline[arrows=-]{b}{f}
   \ncline[arrows=-]{b}{g}

   \ncline[arrows=-]{c}{e}
   \ncline[arrows=-]{c}{f}
   \ncline[arrows=-]{c}{g}

   \ncline[arrows=-]{d}{e}   
   \ncline[arrows=-]{d}{f}   
   \ncline[arrows=-]{d}{g}

   

   \rput(7.5,2.5){\rput[b](0.25,0.4){$H$}}
   \rput(7.5,0.5){\rput[b](0.25,0.4){$V$}}   


\end{pspicture}

\endTeXtoEPS
\end{document}