a-a a-b aaa aab aag aak aao aar aas aav aay ab- aba abb abg abk abo abr abs abv aby ag- aga agb agg agk ago agr ags agv agy aka akb akg akk ako akr aks akv aoa aob aog aok aoo aor aos aov ar- ara arb arg ark aro arr ars arv ary as- asa asb asg ask aso asr ass asv asy av- ava avb avg avk avo avr avs avy ay- aya ayk ayo ayr ays baa bab bag bak bao bar bas bav bay bba bbb bbg bbk bbo bbr bbs bby bga bgb bgg bgk bgo bgr bgs bgv bka bkb bkg bkk bko bkr bks bkv boa bob bog bok boo bor bos bov boy bra brb brg brk bro brr brs brv bry bsa bsb bsg bsk bso bsr bss bsv bsy bva bvb bvg bvk bvo bvr bvs bvv by- bya byg byk byo byr bys gaa gab gag gak gao gar gas gav gay gba gbg gbk gbo gbr gbs gbv gby gga ggb ggg ggo ggr ggs ggv gka gkb gko gks goa gob gog gok goo gor gos gov goy gra grb grg grk gro grr grs grv gry gsa gsb gsg gsk gso gsr gss gsv gva gvb gvg gvk gvo gvr gvs gy- gya gyb gyo gyr gys ka- kaa kab kag kak kao kar kas kav kay kba kbb kbk kbo kbr kbs kga kgb kgo kgs kgv kgy kkb kkk kkr kks kkv kky koa kob kog kok koo kor kos koy kra krg krk kro krr krs krv kry ksa ksb ksg ksk kso ksr kss ksv kva kvb kvk kvo kvr kvs kvv kya kyo kyr kys oaa oab oag oak oao oar oas oav ob- oba obb obg obk obo obr obs obv oby oga ogg ogo ogs ogy oka okb okg okk oko okr oks oo- ooa oob oog ook ooo oor oos oov or- ora orb org ork oro orr ors orv ory os- osa osb osg osk oso osr oss osv ov- ova ovb ovo ovs ovv oya oyo oys ra- raa rab rag rak rao rar ras rav ray rba rbb rbg rbk rbo rbr rbs rga rgb rgg rgk rgo rgr rgs rgv rkb rkg rkk rko rks rkv rky roa rob rog rok roo ror ros rov roy rra rrb rrg rrk rrr rrs rsa rsb rsg rsk rso rsr rss rsv rva rvb rvg rvo rvr rvs rvv rvy ry- rya ryg ryk ryo ryr rys ryy saa sab sag sak sao sar sas sav say sba sbb sbg sbk sbo sbr sbs sbv sby sga sgb sgg sgk sgo sgr sgs sgv sk- ska skb skg skk sko skr sks sky soa sob sog sok soo sor sos sov soy sr- sra srb srg srk sro srr srs srv sry ss- ssa ssb ssg ssk sso ssr sss ssv sva svb svg svk svo svr svs svv svy sy- sya syb syg syk syr sys v-a vaa vab vag vak vao var vas vav vay vba vbg vbk vbo vbr vbs vbv vga vgg vgo vgr vgs vka vkb vkg voa vob vog vok voo vor vos vov voy vra vrb vrg vrk vrr vrs vry vsa vsb vsg vsk vso vsr vss vsv vva vvb vvg vvo vvr vvs vvv vyg yaa yab yag yak yao yar yas yav yay ybg ybr ybs yby yga ygo yka ykk yob yog yok yoo yor yos yoy yra yrg yro yrs ysa ysb ysg ysk yso ysr yss ysy yva yvo yvr yvy yyb yyg yys yyy