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
u4 2 0 0 0 1 0 0 0 0 0 0 0 0
u3 2 0 0 0 1 0 0 0 0 0 0 0 0
u2 2 0 0 0 1 0 0 0 0 0 0 0 0
u1 2 0 0 0 1 0 0 0 0 0 0 0 0