Hierarchy	Input	Constant Input	Unused Input	Floating Input	Output	Constant Output	Unused Output	Floating Output	Bidir	Constant Bidir	Unused Bidir	Input only Bidir	Output only Bidir
u3	8	0	2	0	18	0	0	0	0	0	0	0	0
u2	24	4	1	4	9	4	4	4	0	0	0	0	0
u1	6	0	1	0	3	0	0	0	16	0	14	0	14