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+digraph test {

+

+    size="7,9.5";

+    page="8,10.5";

+    ratio=fill;

+    rankdir=LR;

+

+    { rank=same;

+      node [shape=house];

+      A;C;E;G;I;K;M;O;Q;S;U;W;Y;

+      node [shape=invhouse];

+      B;D;F;H;J;L;N;P;R;T;V;X;Z;

+    }

+

+    { rank=same;

+      node [shape=parallelogram];

+      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];

+      "a ----- long thin parallelogram";

+      "xx" [label="m"];

+      "yy" [label="a\nb\nc\nd\ne\nf"];

+      node [shape=octagon];

+      "Octagon" [label="This is a test\nof a multiline\nlabel in an\noctagon with approx\nsquare aspect"];

+      node [shape=parallelogram];

+      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];

+      "a ----- long thin parallelogram";

+      "zz" [label="m"];

+      "qq" [label="a\nb\nc\nd\ne\nf"];

+      ordering=out;

+    }

+

+    Parallelogram -> A;

+    Parallelogram -> B;

+    Parallelogram -> C;

+    Parallelogram -> D;

+    Parallelogram -> E;

+    Parallelogram -> F;

+    Parallelogram -> G;

+    Parallelogram -> H;

+    Parallelogram -> I;

+    Parallelogram -> J;

+    Parallelogram -> K;

+    Parallelogram -> L;

+    Parallelogram -> M;

+    Parallelogram -> N;

+    Parallelogram -> O;

+    Parallelogram -> P;

+    Parallelogram -> Q;

+    Parallelogram -> R;

+    Parallelogram -> S;

+    Parallelogram -> T;

+    Parallelogram -> U;

+    Parallelogram -> V;

+    Parallelogram -> W;

+    Parallelogram -> X;

+    Parallelogram -> Y;

+    Parallelogram -> Z;

+

+    { rank=same;

+      node [shape=triangle];

+      a;c;e;g;i;k;m;o;q;s;u;w;y;

+      node [shape=tripleoctagon];

+      b;d;f;h;j;l;n;p;r;t;v;x;z;

+    }

+

+    a -> Parallelogram -> Octagon;

+    b -> Parallelogram -> Octagon;

+    c -> Parallelogram -> Octagon;

+    d -> Parallelogram -> Octagon;

+    e -> Parallelogram -> Octagon;

+    f -> Parallelogram -> Octagon;

+    g -> Parallelogram -> Octagon;

+    h -> Parallelogram -> Octagon;

+    i -> Parallelogram -> Octagon;

+    j -> Parallelogram -> Octagon;

+    k -> Parallelogram -> Octagon;

+    l -> Parallelogram -> Octagon;

+    m -> Parallelogram -> Octagon;

+    n -> Parallelogram -> Octagon;

+    o -> Parallelogram -> Octagon;

+    p -> Parallelogram -> Octagon;

+    q -> Parallelogram -> Octagon;

+    r -> Parallelogram -> Octagon;

+    s -> Parallelogram -> Octagon;

+    t -> Parallelogram -> Octagon;

+    u -> Parallelogram -> Octagon;

+    v -> Parallelogram -> Octagon;

+    w -> Parallelogram -> Octagon;

+    x -> Parallelogram -> Octagon;

+    y -> Parallelogram -> Octagon;

+    z -> Parallelogram -> Octagon;

+}