circe[11],
core[8], coir[8], oper[8], pore[8], peri[7], pier[7], prei[7], roie[5],
cop[10], epo[7], opi[7], pro[7], cer[6], per[6], rep[6], oie[4], roi[4], ire[3],
po[6], pi[5], ei[2], er[2], re[2],
