% Generated by Jastex 

\documentclass{article}
\usepackage[usenames]{color}% delete this line if you don't use colors

\usepackage{gastex}
\begin{document}


\begin{picture}(111,75)(0,-75)
\put(0,-75){\framebox(111,75){}}
\node[NLangle=0.0,ilength=7.0,Nmarks=ir,Nw=12.0,Nh=12.0,Nmr=6.0](n32)(20.0,-36.0){\{1\}}

\node[NLangle=0.0,Nmarks=r,Nw=12.0,Nh=12.0,Nmr=6.0](n33)(64.0,-24.0){\{1,2\}}

\node[NLangle=0.0,Nw=12.0,Nh=12.0,Nmr=6.0](n34)(100.0,-44.0){\{2a\}}

\node[NLangle=0.0,Nw=12.0,Nh=12.0,Nmr=6.0](n35)(60.0,-64.0){\{2,3\}}

\drawedge[ELdist=2.5](n32,n33){a}

\drawloop[ELdist=2.5](n33){a}

\drawedge[ELdist=2.5](n35,n32){a}

\drawedge[ELdist=2.5,curvedepth=8.0](n33,n34){b}

\drawedge[ELdist=2.5,curvedepth=8.0](n34,n35){b}

\drawedge[ELdist=2.5,curvedepth=8.0](n35,n34){b}



\end{picture}
\end{document}