a-a a-b aaa aab aao aar aas aau ab- aba abb abo abr abs abu aoa aob aoo aor aos aou ar- ara arb aro arr ars aru as- asa asb aso asr ass asu au- aua aub auo aur aus b-u baa bab bao bar bas bau bba bbb bbo bbr bbs bbu boa bob boo bor bos bou bra brb bro brr brs bru bsa bsb bso bsr bss bsu bua bub buo bur bus buu oaa oab oao oar oas oau ob- oba obb obo obr obs obu oo- ooa oob ooo oor oos or- ora orb oro orr ors oru os- osa osb oso osr oss osu ou- oua ouo our ous ra- raa rab rao rar ras rau rba rbb rbo rbr rbs rbu roa rob roo ror ros rou rra rrb rrr rrs rru rsa rsb rso rsr rss rsu rua rub ruo rur rus ruu saa sab sao sar sas sau sba sbb sbo sbr sbs sbu soa sob soo sor sos sou sr- sra srb sro srr srs ss- ssa ssb sso ssr sss ssu sua sub suo sur sus suu ua- uaa uab uao uar uas uau uba ubb ubo ubr ubs ubu uoa uob uoo uor uos ur- ura urb uro urr urs uru usa usb uso usr uss usu uua uur uus uuu

-ous aaaa aaab aaar aaas aaba aabb aaoo aara aaro aars aaru aasa aass aasu aaus abaa abab abar abas abau abb- abba abbb abbo abbr abbs aboa abob aboo abor abos abou abra abro abrs abs- absa abss absu abua abus aoba aora aorb aors aoss aous arab arar aras arau arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arru ars- arsa arso arsu arua arub asaa asab asao asar asas asau asba asbo asbu asob asor asos asou asra asro asrs asru assa asso assr asss assu asub asur asus auaa aur- aura auro ausa ausu baaa baar baas baba babb babo babr babs babu baos bar- bara barb baro barr bars baru basa baso bass basu bau- baur bbas bbau bbbb bbbs boab boar boas boba bobb bobo bobs bobu boob boor boos bor- bora boro borr bors boru bosa boso boss bosu boua bour bous brab brao bras brau broa brob broo bror bros brou brrr brrs brsb brsr brus bsaa bsas bsos bsra buar buba bubb bubo bubs bubu bur- bura burb buro burr burs buru busa buss busu buus oaau oara oars oass obas obba obbo obor obos obra obro obsr obss obus ooaa ooba oooo ooos oora oosa oous orab orao orar oras orba orbb orbo orbs orbu oro- oror oros orra orro orrs orsa orso orsu orub orus osar osas osba osoo osor osos osro ossa ossb osso ossu oubs our- oura ouro ours ousa ouu- raab raas raba rabb rabo rabs rabu raob raos rara rarb raro rars rasa raso rass rasu raua raub raus rbbb rbbr rbbs rbss roab roar roas rob- roba robb robo robs robu roob roor roos rora roro roru rosa roso ross roua roub rous rras rrrr rsaa rsos rssa rsua ruas ruba rubb rubs rubu rura ruro rurs ruru rusa ruso russ rusu s-os saab saar saas saba sabb sabo sabr sabs sabu saor saos saou sara saro sarr sars saru sasa saso sass saua saur saus sbaa sbar sbas sbbs sbor sbsa sbus soar soas soba sobo sobr sobs sobu soor soos sora sorb soro sorr sors soru sosa soso soss sour sous sras sros srub ssaa ssab ssao ssas ssau ssbr ssra ssrs sssa sssb ssss suar suas sub- suba subb subo subs suor suos sur- sura suro surr surs suru sus- susa suso suss susu suus uars uaru uasa uaua ubar ubba ubbo ubos ubra uor- urao uras urau urba urbs uro- uroa uroo urra ursa urso urss ursu urur urus us-a usaa usar usas usba usbr usbs usos usra ussa ussb ussr usss ussu usua usus uuuu

-aaa- aaaas aaasa aaass aabaa aabba aabra aarau aasra abaab ababa ababs ababu abara abaru abasa abass abbar abbas abbos abbou abbrs abbur aboab abobo abora aboso abous abrar abras abrus absar abura aburr aoos aorus ar-ab arab- araba arabo arabs arara arars araru arass arasu arbab arbar arbas arbor arbos arbus aroab aroar aroba aroor aroos arora arosa arras arrau arros arrou arrua arsos aruaa aruba arura aruru arus- arusa asaba asara asaro asasa asbos asbro asbru asoar asors asosa asour asrar asror assab assas assoa assos assur asubs asura auass aubas aurar auras auro- auroa auror auros aurra ausar ausra aussa baars babar babas babau babbs baboo babos babou babra babur babus baoro baraa barab barao barar baras barba barbs barbu baro- baroa baroo baror baros barra barro barrs barru barsa barss barua barus basab basar baso- basor basra bassa basso bassu basuo baubo baura bauru bbuss bo-bo boaro boars bobar bobos bobr booba boobs boora boors booru boosa boras borau borba borbo boro- boroa boroo boros borou borra borro borsa borsu borus bosas bosau bosor bosra bossa bosso bouar bouba boura bours braas brasa brass brobo brobs broos brora bross brous brrar brrrr brusa bruss bsaba bsous bubas bubba buraa burao buras burbs buroo buros burra burro burrs burru bursa burus busaa busra bussa busso bussu busua busur busuu o-r-b oaror obaba obara obora oboro obrab obras ooooo oraas oraba orara orbus orobo oroso orosu oroua oruro osars osaru ososo ossos ossur osusu ouara ouoro ourba ousas ra-ra raaba raaor raasa raaso rabab rabas rabba rabor rabos rabou rarus rasar rasas rasau rasor rasos rasra rassa rasso rausu ro-ro roars robab robar robas robbo robbs robo- robor robur rooba roosa rorbu rorra rosar rosas rossa rosso rosss rosu rouba roura rousa rubab rubba rubor rubra rubus rusar rusas rusor russa russo ruusa s-bus s-o-r sa-ra saaba saabo saabs saara saasa saasu sabar sabas sabau saboo sabor sabou sabra sabsa sabur sabus saora saraa sarab sarao saras sarau sarbu saros sarra sarro sarsa sarsu