eee eef eeg eel een eex ef- efe eff efg efi efl efx ege egf egg egi egl egn egx eie eif eig eii eil ein eix ele elf elg eli ell eln elx en- ene enf eng eni enl enn ex- exe exi exl exx fee fef feg fei fel fen fex ffe fff ffg ffi ffl ffn ffx fge fgf fgg fgi fgl fgn fie fif fig fii fil fin fix fle flf flg fli fll fln flx fne fnf fng fni fnl fnn fnx fxe fxg fxi fxx ge- gee gef geg gei gel gen gex gfe gff gfi gfl gfx ggg ggi ggn gie gif gig gii gil gin gle glf glg gli gll gln glx gne gnf gni gnl gnn gxf gxl i-f ie- iee ief ieg iei iel ien iex ife iff ifg ifi ifl ifn ifx ige igf igg igi igl ign iie iif iii iil iin iix il- ile ilf ilg ili ill iln ilx in- ine inf ing ini inl inn inx ixe ixi ixl ixn lee lef leg lei lel len lex lfe lff lfg lfi lfl lfn lfx lge lgf lgg lgi lgl lgn lie lif lig lii lil lin lix lle llf llg lli lll lln lne lng lni lnl lnn lxi lxx n-i ne- nee nef neg nei nel nen nex nfe nff nfi nfl nfn nge ngf ngg ngi ngl ngn nie nif nig nii nil nin nix nle nlf nlg nli nll nln nlx nne nnf nng nni nnl nnn nxl xee xeg xel xen xex xfe xfl xfn xfx xge xgi xgl xie xii xin xix xlf xlg xli xxi xxl xxx