a-a a-b aaa aab aag aah aak aar aas ab- aba abb abg abh abk abr abs ag- aga agb agg agh agk agr ags aha ahb ahg ahh ahk ahr ahs aka akb akg akh akk akr aks ar- ara arb arg arh ark arr ars as- asa asb asg ash ask asr ass baa bab bag bah bak bar bas bba bbb bbg bbh bbk bbr bbs bga bgb bgg bgh bgk bgr bgs bha bhb bhg bhh bhk bhr bhs bka bkb bkg bkk bkr bks bra brb brg brh brk brr brs bsa bsb bsg bsh bsk bsr bss gaa gab gag gah gak gar gas gba gbg gbh gbk gbr gbs gga ggb ggg ggh ggr ggs gha ghb ghg ghh ghr ghs gka gkb gkh gks gra grb grg grh grk grr grs gsa gsb gsg gsk gsr gss haa hab hag hah hak har has hba hbb hbg hbh hbk hbr hbs hga hgb hgg hgh hgk hgr hgs hha hhb hhg hhh hhk hhr hhs hka hkb hkg hkh hkk hkr hks hr- hra hrb hrg hrh hrk hrr hrs hsa hsb hsg hsh hsk hsr hss ka- kaa kab kag kah kak kar kas kba kbb kbh kbk kbr kbs kga kgb kgh kgs kha khh khk khr khs kkb kkh kkk kkr kks kra krg krk krr krs ksa ksb ksg ksh ksk ksr kss ra- raa rab rag rah rak rar ras rba rbb rbg rbh rbk rbr rbs rga rgb rgg rgh rgk rgr rgs rh- rha rhb rhg rhh rhr rhs rkb rkg rkk rks rra rrb rrg rrh rrk rrr rrs rsa rsb rsg rsh rsk rsr rss saa sab sag sah sak sar sas sba sbb sbg sbh sbk sbr sbs sga sgb sgg sgh sgk sgr sgs sh- sha shb shg shh shk shr shs sk- ska skb skg skh skk skr sks sr- sra srb srg srh srk srr srs ss- ssa ssb ssg ssh ssk ssr sss