inv Inverter.
nand2 2-input NAND.
nand3 3-input NAND.
nand4 4-input NAND.
nor2 2-input NOR.
nor3 3-input NOR.
nor4 4-input NOR.
o22ai 2-input OR into both inputs of 2-input NAND.
a22oi 2-input AND into both inputs of 2-input NOR.
a222oi 2-input AND into all inputs of 3-input NOR.
o2111ai 2-input OR into first input of 4-input NAND.
o211ai 2-input OR into first input of 3-input NAND.
o21ai 2-input OR into first input of 2-input NAND.
o2111a 2-input OR into first input of 4-input AND.
o221ai 2-input OR into first two inputs of 3-input NAND.
o41ai 4-input OR into 2-input NAND.
o311ai 3-input OR into 3-input NAND.
o31ai 3-input OR into 2-input NAND.
o32ai 3-input OR and 2-input OR into 2-input NAND.
a2111oi 2-input AND into first input of 4-input NOR.
a211oi 2-input AND into first input of 3-input NOR.
a32oi 3-input AND into first input, and 2-input AND into 2nd input of 2-input NOR.
a31oi 3-input AND into first input of 2-input NOR.
a311oi 3-input AND into first input of 3-input NOR.
a41oi 4-input AND into first input of 2-input NOR.
a21oi 2-input AND into first input of 2-input NOR.
a221oi 2-input AND into first two inputs of 3-input NOR.
ebufn Tri-state buffer, negative enable.
einvn Tri-state inverter, negative enable.
einvp Tri-state inverter, positive enable.