Inputs:

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 17, 18, 19

Outputs:

12 (Combinatorial, Output feedback output, Active low)
15 (Combinatorial, No output feedback, Active low)
16 (Combinatorial, No output feedback, Active low)

Equations:

/o12 = i1 +
       i2 +
       i3 +
       /i4 +
       /i5
o12.oe = vcc

/o15 = 
o15.oe = vcc

/o16 = 
o16.oe = vcc