drop[6], spod[6], pros[5], psor[5], spor[5],
pod[5], pop[5], odr[4], ord[4], rod[4], por[4], pro[4], rop[4], drr[4], prr[4], osp[4], ros[3], rwo[3], wrr[3],
do[3], od[3], op[3], po[3], or[2], ro[2], os[2],
