a-a a-b aaa aab aak aao aar aas aau ab- aba abb abk abo abr abs abu aka akb akk ako akr aks aku aoa aob aok aoo aor aos aou ar- ara arb ark aro arr ars aru as- asa asb ask aso asr ass asu au- aua aub auk auo aur aus b-u baa bab bak bao bar bas bau bba bbb bbk bbo bbr bbs bbu bka bkb bkk bko bkr bks boa bob bok boo bor bos bou bra brb brk bro brr brs bru bsa bsb bsk bso bsr bss bsu bua bub buk buo bur bus buu ka- kaa kab kak kao kar kas kau kba kbb kbk kbo kbr kbs kbu kkb kkk kkr kks kku koa kob kok koo kor kos kou kra krk kro krr krs kru ksa ksb ksk kso ksr kss ksu kub kuk kur kus kuu oaa oab oak oao oar oas oau ob- oba obb obk obo obr obs obu oka okb okk oko okr oks oku oo- ooa oob ook ooo oor oos or- ora orb ork oro orr ors oru os- osa osb osk oso osr oss osu ou- oua ouk ouo our ous ra- raa rab rak rao rar ras rau rba rbb rbk rbo rbr rbs rbu rkb rkk rko rks rku roa rob rok roo ror ros rou rra rrb rrk rrr rrs rru rsa rsb rsk rso rsr rss rsu rua rub ruk ruo rur rus ruu saa sab sak sao sar sas sau sba sbb sbk sbo sbr sbs sbu sk- ska skb skk sko skr sks sku soa sob sok soo sor sos sou sr- sra srb srk sro srr srs ss- ssa ssb ssk sso ssr sss ssu sua sub suk suo sur sus suu ua- uaa uab uak uao uar uas uau uba ubb ubk ubo ubr ubs ubu uka ukb ukk ukr uku uoa uob uok uoo uor uos ur- ura urb urk uro urr urs uru usa usb usk uso usr uss usu uua uur uus uuu

-ous a-ak a-ok aaaa aaab aaar aaas aaba aabb aaka aaku aaoo aara aaro aars aaru aasa aass aasu aaus abaa abab abak abar abas abau abb- abba abbb abbo abbr abbs aboa abob abok aboo abor abos abou abra abro abrs abs- absa abss absu abua abuk abus akaa akao akar akas akka akko akku akok akos akr- akra aksa aksu akua aoba aoks aora aorb aors aoss aous arab arak arar aras arau arba arbs arka arko arks aroa arob aroo aror aros arr- arra arrk arro arrr arrs arru ars- arsa arsk arso arsu arua arub asaa asab asak asao asar asas asau asba asbo asbu aska asko askr asks asob asok asor asos asou asra asro asrs asru assa assk asso assr asss assu asub asur asus auaa auks aur- aura auro ausa ausu baaa baak baar baas baba babb babo babr babs babu bak- baka bako bakr baks baku baos bar- bara barb bark baro barr bars baru basa bask baso bass basu bau- bauk baur bbas bbau bbbb bbbs boab boak boar boas boba bobb bobo bobs bobu boka boko boks boku boob book boor boos bor- bora bork boro borr bors boru bosa bosk boso boss bosu boua bouk bour bous brab brak brao bras brau brka brkb broa brob brok broo bror bros brou brrr brrs brsb brsr brus bsaa bsas bsos bsra buar buba bubb bubo bubs bubu buka bukk buko buku bur- bura burb burk buro burr burs buru busa busk buss busu buus k-os kaaa kaab kaak kaar kaas kaba kabb kabo kabr kabu kaka kakk kako kaks kaku kaoa kaok kaor kaos kara karb kark karo karr kars karu kas- kasa kasb kask kaso kasr kass kasu kau- kaub kauk kauo kaur kaus kbaa kbab kbak kbar kbas kbba kbbb kbbk kbbo kbbr kbbs kbbu kbkb kbkk kbko kbkr kboa kbob kbok kboo kbos kbra kbrb kbrk kbro kbru kbsa kbsb kbsk kbso kbsr kbss kbsu kbua kbub kbuk kbur kbus kbuu kkaa kkar kkba kkbb kkbo kkbr kkbs kkkk kkoa kkob kkoo kkor kkrb kkrk kkro kkrr kkrs kksa kksr kkss kksu kkua kkus kkuu koab koak koar koas koba kobb kobk kobo kobr kobs kobu koka kokb kokk koko kokr koks koku koob kook kooo koor koos koou kora korb kork koro korr kors koru kos- kosa kosb koso kosr koss kosu koua koub kour kous kouu krab krak krar kras krba krbb krbk krbr krka krkk krko krkr krks krku kroa krob krok kroo kror kros krrb krrk krro krrr krrs krsa krsk krsr krss krsu krua kruk krur ksab ksak ksar ksas ksau ksba ksbr ksbs kska kskb kskk ksko kskr ksks ksku ksob ksok ksoo ksor ksos ksou ksra ksrb ksro ksrr ksrs kssa ksso kssr ksss kssu ksua ksub ksuu kuar kuau kuba kubb kubo kubr kubs kubu kuka kukk kuks kuku kuoa kuok kuoo kuos kura kurb kurk kuro kurr kurs kuru kusa kusb kuso kusu kuub kuuk kuur kuuu oaau oaks oara oars oass obak obas obba obbo obkb obok obor obos obra obro obsr obss obus okak okas okka okko okok okor okra okro oksa okso okur okus ooaa ooak ooba ooku oooo ooos oora oosa oous orab orak orao orar oras orba orbb orbo orbs orbu orka orko oro- orok oror oros orra orro orrs orsa orsk orso orsu orub orus osak osar osas osba osku osoo osor osos osro ossa ossb osso ossu oubs our- oura ouro ours ousa ouu- raab raak raas raba rabb rabk rabo rabs rabu raka rakk raku raob raok raos rara rarb rark raro rars rasa rask raso rass rasu raua raub rauk raus rbbb rbbr rbbs rbss rkos rkss roab roak roar roas rob- roba robb robo robs robu roka rokk roko rokr roks roku roob rook roor roos rora rork roro roru rosa roso ross roua roub rouk rous rras rrrr rsaa rsos rssa rsua ruas ruba rubb