a-a a-b aaa aab aad aaf aao aar aas aau ab- aba abb abd abf abo abr abs abu ad- ada adb add adf ado adr ads adu af- afa afb afd aff afo afr afs afu aoa aob aod aof aoo aor aos aou ar- ara arb ard arf aro arr ars aru as- asa asb asd asf aso asr ass asu au- aua aub aud auf auo aur aus b-u baa bab bad baf bao bar bas bau bba bbb bbd bbf bbo bbr bbs bbu bda bdb bdd bdf bdo bdr bds bdu bfa bfb bfd bff bfo bfr bfs bfu boa bob bod bof boo bor bos bou bra brb brd brf bro brr brs bru bsa bsb bsd bsf bso bsr bss bsu bua bub bud buf buo bur bus buu daa dab dad daf dao dar das dau dba dbb dbd dbf dbo dbr dbs dbu dda ddb ddd ddf ddo ddr dds ddu dfa dfb dfd dff dfo dfr dfs dfu doa dob dod dof doo dor dos dou dra drb drd dro drr drs dru dsa dsb dsd dsf dso dsr dss dsu dua dub dud duf duo dur dus faa fab fad faf fao far fas fau fba fbb fbd fbf fbo fbr fbs fbu fda fdb fdd fdf fdo fdr fds fdu ffa ffd fff ffo ffr ffs ffu foa fob fof foo for fos fou fra frb frd frf fro frr frs fru fsa fsb fsd fsf fso fsr fss fsu fua fub fud fuf fuo fur fus fuu oaa oab oad oaf oao oar oas oau ob- oba obb obd obf obo obr obs obu oda odb odd odf odo odr ods odu of- ofa ofb ofd off ofo ofr ofs ofu oo- ooa oob ood oof ooo oor oos or- ora orb ord orf oro orr ors oru os- osa osb osd osf oso osr oss osu ou- oua oud ouf ouo our ous ra- raa rab rad raf rao rar ras rau rba rbb rbd rbf rbo rbr rbs rbu rda rdb rdd rdf rdo rdr rds rdu rfa rfb rfd rff rfo rfr rfs rfu roa rob rod rof roo ror ros rou rra rrb rrd rrf rrr rrs rru rsa rsb rsd rsf rso rsr rss rsu rua rub rud ruf ruo rur rus ruu saa sab sad saf sao sar sas sau sba sbb sbd sbf sbo sbr sbs sbu sda sdb sdd sdf sdo sdr sds sdu sfa sfb sfd sff sfo sfr sfs sfu soa sob sod sof soo sor sos sou sr- sra srb srd srf sro srr srs ss- ssa ssb ssd ssf sso ssr sss ssu sua sub sud suf suo sur sus suu ua- uaa uab uad uaf uao uar uas uau uba ubb ubf ubo ubr ubs ubu uda udb udd udf udo udr uds udu ufa ufd uff ufo ufr ufs ufu uoa uob uod uoo uor uos ur- ura urb urd urf uro urr urs uru usa usb usd usf uso usr uss usu uua uur uus uuu

-ous a-do a-fu aaaa aaab aaad aaaf aaar aaas aaba aabb aabd aada aads aadu aafa aafb aafd aaff aaoo aara aard aaro aars aaru aasa aasd aasf aass aasu aaus abaa abab abad abaf abar abas abau abb- abba abbb abbo abbr abbs abda abdo abdu abff aboa abob abod abof aboo abor abos abou abra abro abrs abs- absa absd absf abss absu abua abud abuf abus adaa adab adad adao adar adas adba adda addd addo addr adds addu adfa adfs adob adod adoo ador ados adra adro adrs adsa adso adsr adss adua adub adur afaa afad afao afar afbs afdb affa affo affs afoa afoo afor afr- afra afro afrs afru afsa afsb afua afud afus aoba aora aorb aors aosd aoss aouf aous arab arad araf arar aras arau arba arbs arda ardf ardo ards ardu arfa arfb arff arfs arfu aroa arob arod aroo aror aros arr- arra arro arrr arrs arru ars- arsa arsd arso arsu arua arub arud asaa asab asad asaf asao asar asas asau asba asbo asbu asda asdf asdo asds asfa asob asod asof asor asos asou asra asro asrs asru assa assd asso assr asss assu asub asud asur asus auaa audo aufs aur- aura aurd auro ausa ausd ausu baaa baad baaf baar baas baba babb babo babr babs babu bada badb badd bado badr bads badu baff bafo baos bar- bara barb bard barf baro barr bars baru basa basf baso bass basu bau- baud bauf baur bbad bbas bbau bbbb bbbs bbdd bbdo bd-r bdos bdsd bduf bfas bffs bfsr boab boad boar boas boba bobb bobo bobs bobu boda bodb bodo bods bodu bofa bofd boff bofs bofu boob bood boof boor boos bor- bora bord borf boro borr bors boru bosa boso boss bosu boua boud bouf bour bous brab brad braf brao bras brau brda brdo brds brfu broa brob brod broo bror bros brou brrr brrs brsb brsr brud brus bsaa bsas bsbd bsfa bsff bsfs bsod bsos bsra bsrd bssd buad buar buba bubb bubo bubs bubu buda budb budd budo buds budu buff bufo bufr bur- bura burb burd buro burr burs buru busa buss busu buus d-bo daab daad daar daas daau daba dabb dabo dabs dabu dada dado dads dadu dafa daff dafo dafs daos daou dara darb dard darf daro darr dars daru dasa dasb dasd dass daub daud daur daus dbar dbas dbfo dbfs dbos dbrs dbsa dbss dbus dddd ddss ddub dfaf dfas dfds dffa dfrf doab doar doas doba dobb dobs dobu dod- doda dodd dodo dods doff doob dood doof door doos dora dord dorf doro dorr dors doru dosa doso doss doub doud douf dour dous draa drab drad draf drar dras drau drba drda drob drod drof drou drra drrs drsa drua drub drus druu dsba dsda dsdr dsfa dsoa dsos dsrr dssa duaa duab