a-a a-b aaa aab aag aaj aao aar aas ab- aba abb abg abj abo abr abs ag- aga agb agg agj ago agr ags aja ajb ajj ajo ajr ajs aoa aob aog aoj aoo aor aos ar- ara arb arg arj aro arr ars as- asa asb asg asj aso asr ass baa bab bag baj bao bar bas bba bbb bbg bbo bbr bbs bga bgb bgg bgo bgr bgs bja bjg bjj bjr bjs boa bob bog boj boo bor bos bra brb brg brj bro brr brs bsa bsb bsg bsj bso bsr bss gaa gab gag gaj gao gar gas gba gbg gbj gbo gbr gbs gga ggb ggg ggj ggo ggr ggs gja gjg gjr goa gob gog goo gor gos gra grb grg grj gro grr grs gsa gsb gsg gsj gso gsr gss jaa jab jag jaj jao jar jas jba jbg jbj jbo jbr jbs jga jgb jgo jgr jgs jja jjb jjg jjj jjr jjs joa job jog joj joo jor jos jra jrb jrg jro jrr jrs jsa jsb jsg jsj jso jsr jss oaa oab oag oaj oao oar oas ob- oba obb obg obj obo obr obs oga ogg ogo ogs oja ojb ojo ojs oo- ooa oob oog ooo oor oos or- ora orb org oro orr ors os- osa osb osg osj oso osr oss ra- raa rab rag raj rao rar ras rba rbb rbg rbo rbr rbs rga rgb rgg rgo rgr rgs rja rjg rjr roa rob rog roj roo ror ros rra rrb rrg rrr rrs rsa rsb rsg rsj rso rsr rss saa sab sag saj sao sar sas sba sbb sbg sbj sbo sbr sbs sga sgb sgg sgo sgr sgs sja sjb sjj sjr sjs soa sob sog soj soo sor sos sr- sra srb srg srj sro srr srs ss- ssa ssb ssg ssj sso ssr sss