-er eee eeg eer ees eex ege egg egi egr egs egx eie eig eii eir eis eix ere erg eri err ers es- ese esg esi esr ess esx ex- exe exi exr exs exx ge- gee geg gei ger ges gex ggg ggi ggr ggs gie gig gii gir gis gre grg gri grr grs grx gse gsg gsi gsr gss gsx gxs ie- iee ieg iei ier ies iex ige igg igi igr igs iie iii iir iis iix ir- ire irg iri irr irs irx is- ise isg isi isr iss ixe ixi re- ree reg rei rer res rex rge rgg rgi rgr rgs rgx rie rig rii rir ris rix rrg rri rrr rrs rse rsg rsi rsr rss rsx rxr rxs se- see seg sei ser ses sex sge sgg sgi sgr sgs sgx sie sig sii sir sis six sr- sre srg sri srr srs srx ss- sse ssg ssi ssr sss ssx sxi sxs xee xeg xer xes xex xge xgi xie xii xis xix xrx xsi xss xxi xxx