6 edge[weight=2, dir=forward];
7 t [label="...", style=filled, shape=triangle, height=0.3, width=0.3];
8 f [label="F", style=filled, shape=box, height=0.3, width=0.3];
10 root -> "0" [style=solid];
11 "0" -> "1" [style=solid];
12 "0" -> f [style=dashed];
13 "1" -> "2" [style=dashed];
14 "1" -> f [style=solid];
15 "2" -> "3" [style=dashed];
16 "2" -> f [style=solid];
17 "3" -> "4" [style=dashed];
18 "3" -> f [style=solid];
19 "4" -> "5" [style=solid];
20 "4" -> f [style=dashed];
21 "5" -> t [style=solid];
22 "5" -> f [style=dashed];