a-a a-z aaa aag aao aar aas aaz ag- aga agg ago agr ags agz aoa aog aoo aor aos ar- ara arg aro arr ars arz as- asa asg aso asr ass asz az- aza azg azo azs azz gaa gag gao gar gas gaz gga ggg ggo ggr ggs ggz goa gog goo gor gos goz gra grg gro grr grs gsa gsg gso gsr gss gza gzo gzr oaa oag oao oar oas oga ogg ogo ogs oo- ooa oog ooo oor oos or- ora org oro orr ors orz os- osa osg oso osr oss oza ozo ozs ozz ra- raa rag rao rar ras raz rga rgg rgo rgr rgs roa rog roo ror ros roz rra rrg rrr rrs rsa rsg rso rsr rss rza rzo saa sag sao sar sas saz sga sgg sgo sgr sgs soa sog soo sor sos soz sr- sra srg sro srr srs ss- ssa ssg sso ssr sss ssz sza szr z-g zaa zag zao zar zas zaz zgg zgs zo- zoa zog zoo zor zos zro zrs zsa zsg zsz zzr zzs zzz