x1 = AA
x2 = AAp
x3 = W
x4 = WAA
x5 = WAAp
x6 = WWAA
x7 = WWAAp
x8 = TT
x9 = TTW
x10 = TTWW
x11 = TTWAA
x12 = TTWAAp
x13 = TTAA
x14 = TTAAp
x15 = TTWWAA
x16 = TTWWAAp
x17 = Y
x18 = Yp
x19 = Z
x20 = B
x21 = Bp
x22 = SetYp