-er a-a a-i aaa aae aaf aag aai aan aar aax aea aee aef aeg aei aen aer aex af- afa afe aff afg afi afn afr afx ag- aga age agf agg agi agn agr agx ai- aia aie aif aig aii ain air aix an- ana ane anf ang ani ann anr anx ar- ara are arf arg ari arn arr arx ax- axa axe axi axn axr axx eaa eae eaf eag eai ean ear eax eea eee eef eeg een eer eex ef- efa efe eff efg efi efr efx ega ege egf egg egi egn egr egx eia eie eif eig eii ein eir eix en- ena ene enf eng eni enn enr era ere erf erg eri ern err ex- exa exe exi exr exx faa fae faf fag fai fan far fax fea fee fef feg fei fen fer fex ffa ffe fff ffg ffi ffn ffr ffx fga fge fgf fgg fgi fgn fgr fia fie fif fig fii fin fir fix fna fne fnf fng fni fnn fnr fnx fra fre frf frg fri frn frr fxe fxg fxi fxr fxx gaa gae gaf gag gai gan gar ge- gea gee gef geg gei gen ger gex gfa gfe gff gfi gfr gfx gga ggg ggi ggn ggr gia gie gif gig gii gin gir gna gne gnf gni gnn gnr gra gre grf grg gri grn grr grx gxa gxf i-f ia- iaa iae iaf iag iai ian iar ie- iea iee ief ieg iei ien ier iex ifa ife iff ifg ifi ifn ifr ifx iga ige igf igg igi ign igr iia iie iif iii iin iir iix in- ina ine inf ing ini inn inr inx ir- ira ire irf irg iri irn irr irx ixe ixi ixn n-i naa nae naf nag nai nan nar nax ne- nea nee nef neg nei nen ner nex nfa nfe nff nfi nfn nfr nga nge ngf ngg ngi ngn nia nie nif nig nii nin nir nix nna nne nnf nng nni nnn nra nre nrf nrg nri nrn nrr nrx ra- raa rae raf rag rai ran rar rax re- rea ree ref reg rei ren rer rex rfa rfe rff rfg rfi rfn rfr rga rge rgf rgg rgi rgn rgr rgx ria rie rif rig rii rin rir rix rna rng rni rnn rnr rra rrf rrg rri rrn rrr rxr xaa xaf xag xan xar xee xeg xen xer xex xfa xfe xfn xfx xge xgi xia xie xii xin xix xna xrf xrx xxi xxx