elf[8], pfe[8], fen[7], nef[7], bel[6], ble[6], cel[5], cle[5], lec[5], ben[5], cep[5], lep[5], pel[5], ple[5], cen[4], cne[4], len[4], nep[4], pen[4],
ef[6], fe[6], be[4], ce[3], el[3], pe[3], en[2],
