x1 = cLm
x2 = cLc
x3 = cLn
x4 = cTm
x5 = cTc
x6 = cTn
x7 = cXm
x8 = cXc
x9 = cXn
x10 = cYm
x11 = cYc
x12 = cYn
x13 = cPn
x14 = cAm
x15 = cAc
x16 = cAn