\begin{tikzpicture}[inner sep=0]
	
	\input{src/multicast-routing}
	
	\node [left=0.5ex of chip 32] {\contour{white}{$S$}};
	\node [right=0.5ex of chip 35] {\contour{white}{$T_1$}};
	\node [right=0.5ex of chip 44] {\contour{white}{$T_2$}};
	
	\draw [black,line width=3pt]
	      (chip 33.center)
	   -- (chip 44.center)
	      ;
	
	\draw [black,line width=3pt]
	      (chip 32.center)
	   -- (chip 35.center)
	      ;
\end{tikzpicture}

