-er a-a a-i aaa aae aag aai aar aas aax aea aee aeg aei aer aes aex ag- aga age agg agi agr ags agx ai- aia aie aig aii air ais aix ar- ara are arg ari arr ars arx as- asa ase asg asi asr ass asx ax- axa axe axi axr axs axx eaa eae eag eai ear eas eax eea eee eeg eer ees eex ega ege egg egi egr egs egx eia eie eig eii eir eis eix era ere erg eri err ers es- esa ese esg esi esr ess esx ex- exa exe exi exr exs exx gaa gae gag gai gar gas ge- gea gee geg gei ger ges gex gga ggg ggi ggr ggs gia gie gig gii gir gis gra gre grg gri grr grs grx gsa gse gsg gsi gsr gss gsx gxa gxs ia- iaa iae iag iai iar ias ie- iea iee ieg iei ier ies iex iga ige igg igi igr igs iia iie iii iir iis iix ir- ira ire irg iri irr irs irx is- isa ise isg isi isr iss ixe ixi ra- raa rae rag rai rar ras rax re- rea ree reg rei rer res rex rga rge rgg rgi rgr rgs rgx ria rie rig rii rir ris rix rra rrg rri rrr rrs rsa rse rsg rsi rsr rss rsx rxr rxs saa sae sag sai sar sas sax se- sea see seg sei ser ses sex sga sge sgg sgi sgr sgs sgx sia sie sig sii sir sis six sr- sra sre srg sri srr srs srx ss- ssa sse ssg ssi ssr sss ssx sxi sxs xaa xag xar xas xee xeg xer xes xex xge xgi xia xie xii xis xix xrx xsa xsi xss xxi xxx