1digraph G { 2 a [shape=box] 3 b [shape=polygon] 4 c [shape=ellipse] 5 d [shape=circle] 6 e [shape=point] 7 f [shape=egg] 8 g [shape=triangle] 9 h [shape=plaintext] 10 i [shape=diamond] 11 j [shape=trapezium] 12 k [shape=parallelogram] 13 l [shape=house] 14 m [shape=pentagon] 15 n [shape=hexagon] 16 o [shape=septagon] 17 p [shape=octagon] 18 q [shape=doublecircle] 19 r [shape=doubleoctagon] 20 s [shape=tripleoctagon] 21 t [shape=invtriangle] 22 u [shape=invtrapezium] 23 v [shape=invhouse] 24 w [shape=Mdiamond] 25 x [shape=Msquare] 26 y [shape=Mcircle] 27 z [shape=rect] 28 1 [shape=rectangle] 29 2 [shape=none] 30 3 [shape=note] 31 4 [shape=tab] 32 5 [shape=box3d] 33 6 [shape=component] 34 a -> b -> c -> d -> e -> f -> g 35 h -> i -> j -> k -> l -> m -> n 36 o -> p -> q -> r -> s -> t -> u 37 v -> w -> x -> y -> z -> 1 -> 2 38 3 -> 4 -> 5 -> 6 39} 40