* subcircuit e1of2<> is empty.
* subcircuit empty_1<> is empty.
* subcircuit empty_2<> is empty.
* subcircuit empty_3<> is empty.
.subckt inv<> GND Vdd a b
M0_ GND a b GND nch W=5u L=2u
M1_ Vdd a b Vdd pch W=5u L=2u
.ends

xbar GND Vdd bar.a bar.b inv<>

