elf[8], fen[7], nef[7], ref[7], bel[6], ble[6], cel[5], cle[5], lec[5], ben[5], ber[5], erb[5], reb[5], cen[4], cne[4], len[4], cer[4], ner[3], ren[3],
ef[6], fe[6], be[4], ce[3], el[3], en[2], er[2], re[2],
