xnor2 2-input exclusive NOR.
xnor3 3-input exclusive NOR.
xor2 2-input exclusive OR.
xor3 3-input exclusive OR.
nand2b 2-input NAND, first input inverted.
nand3b 3-input NAND, first input inverted.
nand4bb 4-input NAND, first two inputs inverted.
nand4b 4-input NAND, first input inverted.
nor2b 2-input NOR, first input inverted.
nor3b 3-input NOR, first input inverted.
nor4bb 4-input NOR, first two inputs inverted.
nor4b 4-input NOR, first input inverted.
o2111a 2-input OR into first input of 4-input AND.
o211a 2-input OR into first input of 3-input AND.
o21a 2-input OR into first input of 2-input AND.
o21ba 2-input OR into first input of 2-input AND, 2nd input inverted.
o21bai 2-input OR into first input of 2-input NAND, 2nd iput inverted.
o221a 2-input OR into first two inputs of 3-input AND.
o22a 2-input OR into both inputs of 2-input AND.
o2bb2a 2-input NAND and 2-input OR into 2-input AND.
o2bb2ai 2-input NAND and 2-input OR into 2-input NAND.
o311a 3-input OR into 3-input AND.
o31a 3-input OR into 2-input AND.
o32a 3-input OR and 2-input OR into 2-input AND.
o41a 4-input OR into 2-input AND.
or2b 2-input OR, first input inverted.
or2 2-input OR.
or3b 3-input OR, first input inverted.
or3 3-input OR.
or4bb 4-input OR, first two inputs inverted.
or4b 4-input OR, first input inverted.
or4 4-input OR.
maj3 3-input majority vote.