aaaa aaab aaal aaar aaba aabb aabl aabt aala aall aalo aalu aaoo aara aaro aart aaru aata aatt abaa abab abal abar abat abau abb- abba abbb abbo abbr abbt abla ablo aboa abob abol aboo abor abot abou abra abro abta abtu abua abul abut alaa alal alao alar alat alau alb- alba albo albu all- alla alll allo allr allu aloa alol aloo alor alot alou alro alta alto alua alur alut aoba aola aora aorb aort aoul aout arab aral arar arat arau arba arla arlo aroa arob aroo aror arr- arra arro arrr arrt arru arta arto artr arua arub arul arut at-l at-t ataa atab atal atar atat atla atlo atob atol ator atot atra atro atru atta atto attr attu atua atub atul atur auaa aul- aula aull aulo ault aulu auol aur- aura auro aut- auto baaa baal baar baat baba babb babo babr babu bala ball balo balt balu baol bar- bara barb baro barr bart baru bata bato batt batu bau- baul baur bbau bbbb bblb blaa blab blat blau blbt blob bloo blot blou blub blur blut boab boal boar boat boba bobb bobo bobu bola boll bolo bolt bolu boob bool boor boot bor- bora boro borr bort boru bota botb boto bott boua boul bour bout brab brao brat brau broa brob brol broo bror brot brou brrr brut btaa btla btob btor btrt bttb bual buar buat buba bubb bubo bubu bula bulb bull bult bulu buol bur- bura burb burl buro burr burt buru but- buta buto butt laaa laal laar laat laba labo labr labu lala lall lalo lalu laou lara larb larr lart laru lata lato latt latu laub laul laur laut lbar lblr lbrt llao llat llll lloa lloo loar loat lob- loba lobb lobo lola loll lolo loob lool loor loot lora loro lota lotl loto lotr lott loul lour lout louu lral lrat lrba lrrr lrta ltbl ltra lttr luau luba lula lull lulu lura lurt luta luua oaau oall oara obal obba obbo obla oblu obol obor obot obra obro olar olat olba olbo olla ollo olor olot olta oltu olur ooaa ooba oola oolo oooo oora oort ootb orab oral orao orar orat orba orbb orbo orbu orla orlo orlu oro- oror orot orra orro orta orto orub otar oto- otoo otor otra otro otta otto ottu otur ouat oula oulu our- oura ouro ourt out- outa outb outo ouu- raab raat raba rabb rabl rabo rabu rala ralb rall ralo ralt raob raol rara rarb raro rata rato ratt ratu raua raub raul raut rbbb rbbr rlab rlua roab roar roat rob- roba robb robo robt robu rola roll rolo rolt roob rool roor root rora roro rort roru rota rotl roto rotr rott roua roub roul rout rrat rrrr rtlt ruba rubb rubu rula rull rulo rura ruro ruru ruta rutl ruto rutt rutu taa- taal taar taat taba tabb tabl tabo tabu tala tall talo talu taoa taor taou tara tarb taro tarr tart taru tata tatb tato tatr tatt tatu taua taub taul taur taut tbar tbrb tbta toab toal toat toau toba tobo tobt tobu tol- tola toll tolo tolt tolu tooa tool toor toot tora toro torr tort toru tota toto totr tott toul tour tout traa trab tral trao trat trau troa troo trot trou trra trtr trub trut truu ttab ttbb tttt ttul tual tuao tuar tuat tuba tubb tubo tubr tubu tula tull tulo tulu tuor tura turb turo turr turt turu tuta tutl tuto tutt tutu tuuo uart uaru uata uatu uaua ubal ubar ubba ubbo ubla ublo ubra ulaa ular ulla ullo ullr ulo- ulta ulto ultt ulua ulul uor- ural urao urat urau urba urla uro- uroa urol uroo urra urur urut utal utau utor utto uttu uulu uuta uuuu