INORDER = pa pb pc;
OUTORDER = pd pe pf pg;
pe = !nn;
pf = !np;
pg = !pc;
n_n6 = pa*!pb;
n_n2 = !pb*!pc;
n_n3 = !pa*!pc;
n_n4 = pb*pc;
n_n5 = pa*pc;
np = [31] + [30];
nn = n_n9 + n_n8;
n_n7 = !pa*pb;
n_n8 = !pa*!pb;
n_n9 = pa*pb;
pd = pc;
[28] = n_n6 + n_n2;
[29] = n_n3 + n_n4;
[30] = n_n5 + n_n7;
[31] = [28] + [29];