x1 = M
x2 = MpY
x3 = MpT
x4 = Mpp
x5 = MEK
x6 = MKP3
x7 = MpY_MEK
x8 = MpT_MEK
x9 = M_MEK_Y
x10 = M_MEK_T
x11 = Mpp_MKP3
x12 = MpY_MKP3
x13 = MpT_MKP3_Y
x14 = MpT_MKP3_T
x15 = M_MKP3_T
x16 = M_MKP3_Y