Inputs:

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19

Outputs:

12 (Combinatorial, Output feedback output, Active high)
14 (Registered, Output feedback output, Active high)
16 (Registered, Output feedback output, Active low)
18 (Combinatorial, Output feedback output, Active low)

Equations:

o12 = i1 & /i2 +
      /i3 & /i4 & /i5 & i6 +
      /o18 +
      i13 & /rfo14 & rfo16 +
      rfo14 & i15 & /rfo16
o12.oe = o18

rf14 := i11 & /rfo14 +
        rfo16 & /o18 +
        o12 & /rfo16 & o18
rf14.oe = /o12

/rf16 := o12 & rfo14 +
         /o12 & /rfo14 & /o18 +
         i13 & rfo16
rf16.oe = o18

/o18 = /i7 & i8 & o12 +
       /o12 +
       /i9 & /i11 & rfo14 +
       /i15 & rfo16 & i19 +
       /rfo14 & /rfo16
o18.oe = vcc