-er a-a a-i aaa aae aag aai aan aar aax aea aee aeg aei aen aer aex ag- aga age agg agi agn agr agx ai- aia aie aig aii ain air aix an- ana ane ang ani ann anr anx ar- ara are arg ari arn arr arx ax- axa axe axi axn axr axx eaa eae eag eai ean ear eax eea eee eeg een eer eex ega ege egg egi egn egr egx eia eie eig eii ein eir eix en- ena ene eng eni enn enr era ere erg eri ern err ex- exa exe exi exr exx gaa gae gag gai gan gar ge- gea gee geg gei gen ger gex gga ggg ggi ggn ggr gia gie gig gii gin gir gna gne gni gnn gnr gra gre grg gri grn grr grx gxa ia- iaa iae iag iai ian iar ie- iea iee ieg iei ien ier iex iga ige igg igi ign igr iia iie iii iin iir iix in- ina ine ing ini inn inr inx ir- ira ire irg iri irn irr irx ixe ixi ixn n-i naa nae nag nai nan nar nax ne- nea nee neg nei nen ner nex nga nge ngg ngi ngn nia nie nig nii nin nir nix nna nne nng nni nnn nra nre nrg nri nrn nrr nrx ra- raa rae rag rai ran rar rax re- rea ree reg rei ren rer rex rga rge rgg rgi rgn rgr rgx ria rie rig rii rin rir rix rna rng rni rnn rnr rra rrg rri rrn rrr rxr xaa xag xan xar xee xeg xen xer xex xge xgi xia xie xii xin xix xna xrx xxi xxx