% Generated by Jastex 

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

\usepackage{gastex}
\begin{document}


\begin{picture}(136,88)(0,-88)
\put(0,-88){\framebox(136,88){}}
\node[NLangle=0.0,ilength=7.0,Nmarks=ir,Nw=18.0,Nh=18.0,Nmr=9.0](n17)(28.27,-40.21){\{1\}}

\node[NLangle=0.0,Nmarks=r,Nw=18.0,Nh=18.0,Nmr=9.0](n18)(72.27,-20.21){\{1a,3,4\}}

\node[NLangle=0.0,Nmarks=r,Nw=18.0,Nh=18.0,Nmr=9.0](n19)(120.27,-20.21){\{2,5\}}

\node[NLangle=0.0,Nw=18.0,Nh=18.0,Nmr=9.0](n20)(76.27,-48.21){\{2a\}}

\node[NLangle=0.0,Nmarks=r,Nw=18.0,Nh=18.0,Nmr=9.0](n21)(120.27,-72.21){\{3\}}

\node[NLangle=0.0,Nmarks=r,Nw=18.0,Nh=18.0,Nmr=9.0](n22)(28.27,-72.21){\{5\}}

\node[NLangle=0.0,Nmarks=r,Nw=18.0,Nh=18.0,Nmr=9.0](n23)(68.27,-72.21){\{6\}}

\drawedge[ELdist=2.5](n17,n22){e}

\drawedge[ELdist=2.5](n22,n23){n}

\drawedge[ELdist=2.5](n17,n18){t}

\drawedge[ELdist=2.5](n17,n20){s}

\drawedge[ELdist=2.5](n18,n19){e}

\drawedge[ELdist=2.5](n19,n20){s}

\drawedge[ELdist=2.5](n19,n21){t}

\drawedge[ELdist=2.5](n20,n21){t}



\end{picture}
\end{document}
