a-a a-b a-t aaa aab aao aar aas aat aau aav ab- aba abb abo abr abs abt abu abv aoa aob aoo aor aos aot aou aov ar- ara arb aro arr ars art aru arv as- asa asb aso asr ass ast asu asv at- ata atb ato atr ats att atu atv au- aua aub auo aur aus aut auv av- ava avb avo avr avs avt avu b-u baa bab bao bar bas bat bau bav bba bbb bbo bbr bbs bbt bbu boa bob boo bor bos bot bou bov bra brb bro brr brs brt bru brv bsa bsb bso bsr bss bst bsu bsv bta btb bto btr bts btt btu btv bua bub buo bur bus but buu bva bvb bvo bvr bvs bvt bvu bvv oaa oab oao oar oas oat oau oav ob- oba obb obo obr obs obt obu obv oo- ooa oob ooo oor oos oot oov or- ora orb oro orr ors ort oru orv os- osa osb oso osr oss ost osu osv ot- ota otb oto otr ots ott otu otv ou- oua ouo our ous out ov- ova ovb ovo ovs ovv ra- raa rab rao rar ras rat rau rav rba rbb rbo rbr rbs rbt rbu roa rob roo ror ros rot rou rov rra rrb rrr rrs rrt rru rsa rsb rso rsr rss rst rsu rsv rta rtb rto rtr rts rtt rtu rtv rua rub ruo rur rus rut ruu ruv rva rvb rvo rvr rvs rvt rvu rvv saa sab sao sar sas sat sau sav sba sbb sbo sbr sbs sbt sbu sbv soa sob soo sor sos sot sou sov sr- sra srb sro srr srs srt srv ss- ssa ssb sso ssr sss sst ssu ssv sta stb sto str sts stt stu stv sua sub suo sur sus sut suu suv sva svb svo svr svs svt svu svv taa tab tao tar tas tat tau tav tba tbb tbo tbr tbs tbt tbu tbv to- toa tob too tor tos tot tou tov tra trb tro trr trs trt tru trv tsa tsb tso tsr tss tst tsu tsv tta ttb tto ttr tts ttt ttu ttv tua tub tuo tur tus tut tuu tuv tva tvb tvo tvr tvs tvt tvu ua- uaa uab uao uar uas uat uau uav uba ubb ubo ubr ubs ubt ubu ubv uoa uob uoo uor uos uot ur- ura urb uro urr urs urt uru usa usb uso usr uss ust usu usv uta utb uto utr uts utt utu utv uua uur uus uut uuu uva uvb uvo uvs uvu uvv v-a vaa vab vao var vas vat vau vav vba vbo vbr vbs vbv voa vob voo vor vos vot vou vov vra vrb vrr vrs vrt vru vsa vsb vso vsr vss vst vsu vsv vta vtb vto vtr vts vtt vtu vtv vur vus vut vuv vva vvb vvo vvr vvs vvt vvv

-ous aaaa aaab aaar aaas aaav aaba aabb aabt aaoo aara aaro aars aart aaru aasa aass aast aasu aata aatt aaus aava abaa abab abar abas abat abau abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abou abov abra abro abrs abs- absa abss absu abta abts abtu abua abus abut abva aoba aora aorb aors aort aoss aous aout arab arar aras arat arau arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arrt arru ars- arsa arso arst arsu arta arto artr arts artv arua arub arut arva arvo asaa asab asao asar asas asat asau asba asbo asbu asob asor asos asot asou asra asro asrs asru assa asso assr asss asst assu asta astb asto astr asts astv asub asur asus asva asvs at-t ataa atab atar atas atat atbs atob ator atos atot atra atro atru atsb atst atta atto attr atts attu atua atub atur atus atvs auaa aur- aura auro ausa aust ausu aut- auto auts auvs avab avao avar avas avat avor avos avot avou avra avro avst avur avus avva avvo baaa baar baas baat baba babb babo babr babs babu baos bar- bara barb baro barr bars bart baru basa baso bass bast basu bata bato bats batt batu bau- baur bava bavu bbas bbau bbbb bbbs boab boar boas boat boba bobb bobo bobs bobu boob boor boos boot bor- bora boro borr bors bort boru bosa boso boss bost bosu bota botb boto bots bott boua bour bous bout bova bovo brab brao bras brat brau brav broa brob broo bror bros brot brou brrr brrs brsb brsr brst brus brut bruv bsaa bsas bsat bsos bsra bsts bstv btaa btob btor btrt btss bttb btus buar buat buba bubb bubo bubs bubu bur- bura burb buro burr burs burt buru busa buss bust busu but- buta buto buts butt buus oaau oara oars oass oast oats oavs obas obba obbo obor obos obot obra obro obsr obss obst obts obus obvs ooaa ooba oooo ooos oora oort oosa oost ootb oots oous orab orao orar oras orat orav orba orbb orbo orbs orbu oro- oror oros orot orra orro orrs orsa orso orsu orta orto orts orub orus orvr orvs osar osas osat osba osoo osor osos osov osro ossa ossb osso ossu osta ostr osts otar otas otbs oto- otoo otor otos otov otra otro otrs otsa otso otsu otta otto otts ottu otur otus ouat oubs our- oura ouro ours ourt ousa oust out- outa outb outo outs ouu- ovar ovo- ovoo ovot ovra raab raas raat raba rabb rabo rabs rabu raob raos rara rarb raro rars rasa raso rass rast rasu rata rato rats ratt ratu raua raub raus raut rava rbbb rbbr rbbs rbss rbst roab roar roas roat rob- roba robb robo robs robt robu roob roor roos root rora roro rort roru rosa roso ross rost rota roto rotr