a-a a-b aaa aab aaf aag aao aar aas aau ab- aba abb abf abg abo abr abs abu af- afa afb aff afg afo afr afs afu ag- aga agb agf agg ago agr ags agu aoa aob aof aog aoo aor aos aou ar- ara arb arf arg aro arr ars aru as- asa asb asf asg aso asr ass asu au- aua aub auf aug auo aur aus b-u baa bab baf bag bao bar bas bau bba bbb bbf bbg bbo bbr bbs bbu bfa bfb bff bfg bfo bfr bfs bfu bga bgb bgf bgg bgo bgr bgs bgu boa bob bof bog boo bor bos bou bra brb brf brg bro brr brs bru bsa bsb bsf bsg bso bsr bss bsu bua bub buf bug buo bur bus buu faa fab faf fag fao far fas fau fba fbb fbf fbg fbo fbr fbs fbu ffa fff ffg ffo ffr ffs ffu fga fgb fgf fgg fgr fgs foa fob fof fog foo for fos fou fra frb frf frg fro frr frs fru fsa fsb fsf fsg fso fsr fss fsu fua fub fuf fug fuo fur fus fuu gaa gab gaf gag gao gar gas gau gba gbf gbg gbo gbr gbs gbu gfa gfb gff gfo gfr gfs gga ggb ggg ggo ggr ggs ggu goa gob gof gog goo gor gos gou gra grb grf grg gro grr grs gru gsa gsb gsf gsg gso gsr gss gsu gu- gua gub guf gug guo gur gus guu oaa oab oaf oag oao oar oas oau ob- oba obb obf obg obo obr obs obu of- ofa ofb off ofg ofo ofr ofs ofu oga ogf ogg ogo ogs oo- ooa oob oof oog ooo oor oos or- ora orb orf org oro orr ors oru os- osa osb osf osg oso osr oss osu ou- oua ouf ouo our ous ra- raa rab raf rag rao rar ras rau rba rbb rbf rbg rbo rbr rbs rbu rfa rfb rff rfg rfo rfr rfs rfu rga rgb rgf rgg rgo rgr rgs roa rob rof rog roo ror ros rou rra rrb rrf rrg rrr rrs rru rsa rsb rsf rsg rso rsr rss rsu rua rub ruf rug ruo rur rus ruu saa sab saf sag sao sar sas sau sba sbb sbf sbg sbo sbr sbs sbu sfa sfb sff sfg sfo sfr sfs sfu sga sgb sgf sgg sgo sgr sgs sgu soa sob sof sog soo sor sos sou sr- sra srb srf srg sro srr srs ss- ssa ssb ssf ssg sso ssr sss ssu sua sub suf sug suo sur sus suu ua- uaa uab uaf uag uao uar uas uau uba ubb ubf ubg ubo ubr ubs ubu ufa uff ufg ufo ufr ufs ufu uga ugb ugf ugg ugo ugr ugs ugu uoa uob uog uoo uor uos ur- ura urb urf urg uro urr urs uru usa usb usf usg uso usr uss usu uua uug uur uus uuu

-ous a-fu aaaa aaab aaaf aaar aaas aaba aabb aafa aafb aaff aaoo aara aaro aars aaru aasa aasf aass aasu aaus abaa abab abaf abag abar abas abau abb- abba abbb abbo abbr abbs abff aboa abob abof aboo abor abos abou abra abro abrs abs- absa absf abss absu abua abuf abug abus afaa afao afar afbs affa affo affs afgf afoa afog afoo afor afr- afra afro afrs afru afsa afsb afua afus ag-o agag agao agar agas agau agba agbo agfa agga aggu agob agog agoo agos agou agra agro agsa agsg agsu agua agur agus aoba aora aorb aors aoss aouf aous arab araf arag arar aras arau arba arbs arfa arfb arff arfs arfu arga argb argo args aroa arob aroo aror aros arr- arra arrg arro arrr arrs arru ars- arsa arso arsu arua arub arug asaa asab asaf asag asao asar asas asau asba asbo asbu asfa asob asof asog asor asos asou asra asrg asro asrs asru assa asso assr asss assu asub asur asus auaa aufs auga augs aur- aura auro ausa ausu auug baaa baaf baar baas baba babb babo babr babs babu baff bafo baga bagg bago bags baos bar- bara barb barf barg baro barr bars baru basa basf baso bass basu bau- bauf baug baur bbas bbau bbbb bbbs bbga bbrg bfas bffs bfgf bfsr bggs boab boag boar boas boba bobb bobo bobs bobu bofa boff bofs bofu boga bogg bogo bogs boob boof boog boor boos bor- bora borf borg boro borr bors boru bosa boso boss bosu boua bouf bour bous brab braf brag brao bras brau brfu broa brob brog broo bror bros brou brrr brrs brsb brsr brug brus bsaa bsas bsfa bsff bsfs bsgs bsos bsra buar buba bubb bubo bubs bubu buff bufo bufr buga bugg bugo bugs bur- bura burb burg buro burr burs buru busa buss busu buus faaa faas faba fabo fabs fabu fafa faff fafg fafo fagg fago fags fagu fara farb farg faro farr fars faru fasa faso fass faur fbar fbrs fbus ffar ffff ffrr ffsa ffss foaf foar foba fobs fofo fogg fogo fogs foof foos for- fora forb forg foro forr fors fosa fosb foso foss foua foug four fous frab frag fras frau frob frog fros frou frsb frso frub frug fsas fsfo fsgs fsra fssa fssf fuar fubb fubs fubu fuff fufu fuga fugo fugs fugu fuor fur- fura furg furo furr furs fusa fuso fuss fusu gaar gaas gaba gabb gabo gabr gabs gabu gafa gafb gaff gaga gagg gago gags gagu gaos gara garb garf garg garo garr gars gasa gasb gaso gasr gass gaua gaub gaur gaus gbag gbas gbbo gbbs gffa gfoa gfor ggfg gggg ggss goaf goar goas goba gobo gobs goff gofr gofu goga gogo gogs goof goog goor goos gora gorb gorf gorg goro gorr gors goso goss gosu gou- gouf goug gour