digraph G {
	graph [bb="0,0,300,220"];
	node [color="#00ff005f",
		fillcolor="#00ff005f",
		label="\N",
		style=filled
	];
	{
		subgraph cluster_ss81 {
			graph [bb="64,8,134,204"];
			a	[height=0.5,
				pos="99,178",
				width=0.75];
			b	[height=0.5,
				pos="99,106",
				width=0.75];
			a -> b	[pos="e,99,124.1 99,159.7 99,151.98 99,142.71 99,134.11"];
			c	[height=0.5,
				pos="99,34",
				width=0.75];
			b -> c	[pos="e,99,52.104 99,87.697 99,79.983 99,70.712 99,62.112"];
		}
		e	[height=0.5,
			pos="27,178",
			width=0.75];
		f	[height=0.5,
			pos="27,106",
			width=0.75];
		e -> f	[pos="e,27,124.1 27,159.7 27,151.98 27,142.71 27,134.11"];
	}
	{
		subgraph cluster_x {
			graph [bb="142,144,292,212"];
			subgraph cluster_y {
				graph [bb="214,152,284,204"];
				y	[height=0.5,
					pos="249,178",
					width=0.75];
			}
			x	[height=0.5,
				pos="177,178",
				width=0.75];
		}
		x;
		y;
	}
}