0 -> X1_0 0 -> X1_1 0 -> X2_0 0 -> X2_1 0 -> X2_2 0 -> X4_0 0 -> X4_1 0 -> X5_0 0 -> X5_1 0 -> X8_0 0 -> X8_1 0 -> X8_2 0 -> X8_3 0 -> X9_0 0 -> X9_2 0 -> X10_0 0 -> X10_1 0 -> X10_2 0 -> X10_3 0 -> X11_0 0 -> X11_1 0 -> X11_2 0 -> X11_3 0 -> X12_0 0 -> X12_1