a-a a-b aaa aab aaf aaj aao aar aas aau ab- aba abb abf abj abo abr abs abu af- afa afb aff afj afo afr afs afu aja ajb ajf ajj ajo ajr ajs aju aoa aob aof aoj aoo aor aos aou ar- ara arb arf arj aro arr ars aru as- asa asb asf asj aso asr ass asu au- aua aub auf auj auo aur aus b-u baa bab baf baj bao bar bas bau bba bbb bbf bbo bbr bbs bbu bfa bfb bff bfj bfo bfr bfs bfu bja bjf bjj bjr bjs bju boa bob bof boj boo bor bos bou bra brb brf brj bro brr brs bru bsa bsb bsf bsj bso bsr bss bsu bua bub buf buj buo bur bus buu faa fab faf faj fao far fas fau fba fbb fbf fbo fbr fbs fbu ffa fff ffo ffr ffs ffu fja fjb fjs foa fob fof foo for fos fou fra frb frf frj fro frr frs fru fsa fsb fsf fsj fso fsr fss fsu fua fub fuf fuo fur fus fuu jaa jab jaf jaj jao jar jas jau jba jbf jbj jbo jbr jbs jbu jfa jfb jff jfj jfo jfr jfs jja jjb jjf jjj jjr jjs jju joa job jof joj joo jor jos jou jra jrb jrf jro jrr jrs jsa jsb jsf jsj jso jsr jss jsu jub juf juo jur jus oaa oab oaf oaj oao oar oas oau ob- oba obb obf obj obo obr obs obu of- ofa ofb off ofo ofr ofs ofu oja ojb ojo ojs oju oo- ooa oob oof ooo oor oos or- ora orb orf oro orr ors oru os- osa osb osf osj oso osr oss osu ou- oua ouf ouo our ous ra- raa rab raf raj rao rar ras rau rba rbb rbf rbo rbr rbs rbu rfa rfb rff rfj rfo rfr rfs rfu rja rjf rjr roa rob rof roj roo ror ros rou rra rrb rrf rrr rrs rru rsa rsb rsf rsj rso rsr rss rsu rua rub ruf ruo rur rus ruu saa sab saf saj sao sar sas sau sba sbb sbf sbj sbo sbr sbs sbu sfa sfb sff sfj sfo sfr sfs sfu sja sjb sjf sjj sjr sjs sju soa sob sof soj soo sor sos sou sr- sra srb srf srj sro srr srs ss- ssa ssb ssf ssj sso ssr sss ssu sua sub suf suo sur sus suu ua- uaa uab uaf uaj uao uar uas uau uba ubb ubf ubo ubr ubs ubu ufa uff ufj ufo ufr ufs ufu ujo ujs uoa uob uoj uoo uor uos ur- ura urb urf uro urr urs uru usa usb usf usj uso usr uss usu uua 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 abaj abar abas abau abb- abba abbb abbo abbr abbs abff abjs aboa abob abof aboo abor abos abou abra abro abrs abs- absa absf abss absu abua abuf abus afaa afao afar afbs affa affo affs afoa afoo afor afr- afra afro afrs afru afsa afsb afua afus ajab ajao ajar ajas ajba ajob ajoo ajou ajss ajur aoba aora aorb aors aoss aouf aous arab araf arar aras arau arba arbs arfa arfb arff arfs arfu arja arjo arju aroa arob aroo aror aros arr- arra arro arrr arrs arru ars- arsa arso arsu arua arub asaa asab asaf asao asar asas asau asba asbo asbu asfa asja asob asof asor asos asou asra asro asrs asru assa asso assr asss assu asub asur asus auaa aufs auja aujs aur- aura auro ausa ausu baaa baaf baar baas baba babb babo babr babs babu baff bafo baja bajs baju baos bar- bara barb barf baro barr bars baru basa basf baso bass basu bau- bauf baur bbas bbau bbbb bbbs bfas bffs bfsr bjoa boab boar boas boba bobb bobo bobs bobu bofa boff bofs bofu bojo boju boob boof boor boos bor- bora borf borj boro borr bors boru bosa boso boss bosu boua bouf bour bous brab braf braj brao bras brau brfu broa brob broo bror bros brou brrr brrs brsb brsr brus bsaa bsas bsfa bsff bsfs bsos bsra buar buba bubb bubo bubs bubu buff bufo bufr buja bujo buju bur- bura burb burj buro burr burs buru busa buss busu buus faaa faas faba fabo fabs fabu fafa faff fafo faja fajr fara farb faro farr fars faru fasa faso fass fauj faur fbar fbrs fbus ffar ffff ffrr ffsa ffss foaf foar foba fobs fofo foof foos for- fora forb forj foro forr fors fosa fosb foso foss foua four fous frab fras frau frob fros frou frsb frso frub fsas fsfo fsra fssa fssf fuar fubb fubs fubu fuff fufu fuor fur- fura furo furr furs fusa fuso fuss fusu j-ro jaaf jaar jaas jaba jabo jabr jabs jafa jaff jafr jaja jaju jara jarf jaro jarr jars jaru jasa jaso jass jaur jaus jbaa jbar jbob jffs jjar joab joao joar joba jobo jobs jobu jofa jofr jojo joof joor joos jora jorf joro josa joso joss jour jous jrbr jssr jsss juab juar juba jubu juja juju jura jurr jurs juss oaau oafo oafs oara oars oass obas obba obbo obja obor obos obra obro obsr obss obus ofas off- offa offo offr offs offu ofor ofra ofus ojas ojos ojus ooaa ooba ooff oofs oooo ooos oora oosa oous orab orao orar oras orba orbb orbo orbs orbu orff orfs orfu oro- orof oror oros orra orro orrs orsa orso orsu orub oruj orus osaf osar osas osba osfa osoo osor osos osro ossa ossb osso ossu oubs ouff ouju our- oura ouro ours ousa ouu- raab raaf raaj raas raba rabb rabo rabs rabu rafa raff raja rajo rajs