R -> Rin
Rin -> R
Rin -> R
R -> Rin
x1 -> x1p
x1p -> x1
x1p -> x1
x1 -> x1p
x2 -> x2p
x2p -> x2
x2p -> x2
x2 -> x2p
x3 -> x3p
x3p -> x3
x3p -> x3
x3 -> x3p