oporo[6], proso[6], sopor[6], sporo[6],
poro[5], ropo[5], opos[5], ospo[5], pros[5], psor[5], spor[5], roso[4],
por[4], pro[4], rop[4], osp[4], oro[3], oso[3], ros[3],
op[3], po[3], or[2], ro[2], os[2],
