vopo[14], voip[13], vier[9], oper[8], pore[8], peri[7], pier[7], prei[7], roie[5],
vor[9], epo[7], opi[7], pro[7], per[6], rep[6], oie[4], roi[4], ire[3],
po[6], pi[5], ei[2], er[2], re[2],
