k1 = k1
k2 = k1r
k3 = k2
k4 = k2r
k5 = k3
k6 = k3r
k7 = k4
k8 = k5
k9 = k5r
k10 = k6
k11 = k6r
k12 = k7
k13 = k7r
k14 = k8
k15 = k9
k16 = k9r
k17 = k10
k18 = k10r
k19 = k11
k20 = env
k21 = S
k22 = U
k23 = T