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+// Exact reproduction of Figure 4(a) from 10.1109/92.285741.
+module top(...);
+ (* $flowmap_level=1 *) input a;
+ (* $flowmap_level=1 *) input b;
+ (* $flowmap_level=2 *) input c;
+ (* $flowmap_level=1 *) input d;
+ (* $flowmap_level=3 *) input e;
+ (* $flowmap_level=1 *) input f;
+ wire u = !(a&b);
+ wire w = !(c|d);
+ wire v = !(u|w);
+ wire n0 = !(w&e);
+ wire n1 = !(n0|f);
+ output n2 = !(v&n1);
+endmodule