core[8], oper[8], pore[8], zone[7], zero[7], zorn[7], nerz[6],
cop[10], epo[7], pro[7], cer[6], per[6], rep[6], zen[5], erz[5], zer[5], ern[3], ren[3],
po[6], on[3], ne[2], er[2], re[2],
