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+digraph Memory {
+ rankdir=RL;
+ node [shape=box];
+ M0 [label="Initial memory"];
+ X [label="Store p.x = 3"];
+ Y [label="Store p.y = arg"];
+ L [label="Load p.x"];
+ L -> Y -> X -> M0 [color=blue];
+ Return -> Y [color=blue]; Return -> L;
+}