k1 = k1 k2 = k2 k3 = k3 k4 = k4 k5 = k5 k6 = k6 k7 = k7 k8 = k8 k9 = k9 k10 = k10 k11 = k11 k12 = k12 k13 = k13 k14 = k14 k15 = compartment