.model Adder02
.inputs a00 a01 b00 b01
.outputs y00 y01 y02

.subckt FA a=a00 b=b00 cin=c s=y00 cout=00
.subckt FA a=a01 b=b01 cin=00 s=y01 cout=y02
.names c
0
.end

.model FA
.inputs a b cin
.outputs s cout
.names a b k
10 1
01 1
.names k cin s
10 1
01 1
.names a b cin cout
11- 1
1-1 1
-11 1
.end