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+digraph G {bgcolor=blue

+

+  subgraph cluster_1 {

+    fontcolor=white

+    node [style=filled fillcolor="bisque:brown"]

+    n27 [shape = "polygon" ]

+	n26 [shape = "oval" ]

+	n25 [shape = "egg" ]

+	n24 [shape = "trapezium" ]

+	n23 [shape = "parallelogram" ]

+	n22 [shape = "house" ]

+	n21 [shape = "octagon" ]

+	n20 [shape = box  ]

+	n19 [shape = "circle" ]

+	n18 [shape = "diamond" ]

+	n17 [shape = "ellipse" ]

+	n16 [shape = "hexagon" ]

+	n15 [shape = "invtriangle" ]

+	n14 [shape = "pentagon" ]

+	n13 [shape = "rect" ]

+	n12 [shape = "septagon" ]

+	n11 [shape = "triangle" ]

+	n10 [shape = "rectangle" ]

+	n9 [shape = "square" ]

+	n8 [shape = "doublecircle" ]

+	n7 [shape = "doubleoctagon" ]

+	n6 [shape = "tripleoctagon" ]

+	n5 [shape = "invtrapezium" ]

+	n4 [shape = "invhouse" ]

+	n3 [shape = "Mdiamond" ]

+	n2 [shape = "Msquare" ]

+	n1 [shape = "Mcircle"  ]

+	x1 [shape = "note"  ]

+	x2 [shape = "tab"  ]

+	x3 [shape = "folder"  ]

+	x4 [shape = "box3d"  ]

+	x5 [shape = "component"  ]

+

+	label = "Shape Variations";

+  }

+  n1 -> n2-> n3 -> n4 -> n5 -> n6 -> n7 -> n8 -> n9 -> n10 -> n11 -> n12 -> n13 -> n14 

+  n15 -> n16 -> n17 -> n18 -> n19 -> n20 -> n21 -> n22 -> n23 -> n24 -> n25 -> n26 -> n27

+  x1 -> x2 -> x3 -> x4 -> x5

+}

+

+

+