a-a aaa aae aaf aag aao aas aea aee aef aeg aeo aes af- afa afe aff afg afo afs ag- aga age agf agg ago ags aoa aoe aof aog aoo aos as- asa ase asf asg aso ass eaa eae eaf eag eao eas eea eee eef eeg eeo ees ef- efa efe eff efg efo efs ega ege egf egg ego egs eo- eoa eoe eof eog eoo eos es- esa ese esf esg eso ess faa fae faf fag fao fas fea fee fef feg feo fes ffa ffe fff ffg ffo ffs fga fge fgf fgg fgs foa foe fof fog foo fos fsa fse fsf fsg fso fss gaa gae gaf gag gao gas ge- gea gee gef geg geo ges gfa gfe gff gfo gfs gga ggg ggo ggs goa goe gof gog goo gos gsa gse gsf gsg gso gss oaa oae oaf oag oao oas oea oee oef oeg oeo oes of- ofa ofe off ofg ofo ofs oga oge ogf ogg ogo ogs oo- ooa oof oog ooo oos os- osa ose osf osg oso oss saa sae saf sag sao sas se- sea see sef seg seo ses sfa sfe sff sfg sfo sfs sga sge sgf sgg sgo sgs soa soe sof sog soo sos ss- ssa sse ssf ssg sso sss