fen[7], nef[7], ref[7], fes[7], ben[5], ber[5], erb[5], reb[5], cen[4], cne[4], cer[4], ces[4], ner[3], ren[3], sen[3], ser[3],
ef[6], fe[6], be[4], ce[3], en[2], er[2], re[2], es[2], se[2],
