--- /dev/null
+digraph G {
+ graph [nodesep="0.5"];
+ node [label="\N", shape=box];
+ graph [bb="0,0,144,108"];
+ aaa [pos="27,90", width="0.75", height="0.50"];
+ bbb [pos="27,18", width="0.75", height="0.50"];
+ BBB [pos="117,18", width="0.75", height="0.50"];
+ AAA [pos="117,90", width="0.75", height="0.50"];
+ aaa -> bbb [pos="e,27,36 27,72 27,64 27,55 27,46"];
+ aaa -> BBB [pos="e,95,36 50,72 61,63 75,52 87,42"];
+ AAA -> BBB [pos="e,117,36 117,72 117,64 117,55 117,46"];
+ AAA -> bbb [pos="e,49,36 94,72 83,63 69,52 57,42"];
+}
--- /dev/null
+digraph G {
+ graph [ranksep="1.5"];
+ node [label="\N", shape=box];
+ graph [bb="0,0,126,180"];
+ aaa [pos="27,162", width="0.75", height="0.50"];
+ bbb [pos="27,18", width="0.75", height="0.50"];
+ BBB [pos="99,18", width="0.75", height="0.50"];
+ AAA [pos="99,162", width="0.75", height="0.50"];
+ aaa -> bbb [pos="e,27,36 27,144 27,119 27,75 27,46"];
+ aaa -> BBB [pos="e,90,36 36,144 49,119 71,74 85,45"];
+ AAA -> BBB [pos="e,99,36 99,144 99,119 99,75 99,46"];
+ AAA -> bbb [pos="e,36,36 90,144 77,119 55,74 41,45"];
+}