a-ak a-be aaaa aaab aaae aaar aaba aabb aaea aaka aake aaku aara aare aaru abaa abab abae abak abar abau abb- abba abbb abbe abbr abee aber abra abua abue abuk aeer aeka aer- aera akaa akae akar akee aker akeu akka akku akr- akra akre akua arab arae arak arar arau arba arbe area aree arek areu arka arke arr- arra arre arrk arrr arru arua arub arue auaa aube auer auke aur- aura aure baaa baak baar baba babb babe babr babu baek baer bak- baka bake bakr baku bar- bara barb bare bark barr baru bau- bauk baur bbau bbbb bbeb beak bear beau beba bebb bebe beeb beek beer beka beke bera bere berk berr beru beuk beur brab brae brak brau brea breb bree brek brer brka brkb brrr brue buar buba bubb bube bubu buea buer bueu buka buke bukk buku bur- bura burb bure burk burr buru eaba eara earb eare ebba ebbr eber ebru ebur eeea eeee eeka eeke eera eka- ekab ekeb ekek eker ekka ekur erau erba erbb erbe ereb erer erke erra erre erua erub erur euba euer eur- eura eure kaaa kaab kaak kaar kaba kabb kabe kabr kabu kaer kaka kake kakk kaku kara karb kare kark karr karu kau- kaub kaue kauk kaur kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbk kbbr kbbu kbeb kbee kbek kber kbkb kbkk kbkr kbra kbrb kbre kbrk kbru kbua kbub kbue kbuk kbur kbuu kea- keak kear keau keba kebb kebe kebr kebu keek keer keka kekb keke keku ker- kera kerb kere kerk kerr keru keur kkaa kkar kkba kkbb kkbe kkbr kkea kkkk kkrb kkre kkrk kkrr kkua kkuu krab krae krak krar krba krbb krbe krbk krbr krea kreb kree krek kreu krka krke krkk krkr krku krrb krre krrk krrr krua krue kruk krur kuar kuau kuba kubb kube kubr kubu kuek kueu kuka kuke kukk kuku kura kurb kure kurk kurr kuru kuub kuuk kuur kuuu raab raak raba rabb rabe rabk rabu raer raka rake rakk raku rara rarb rare rark raua raub raue rauk rbbb rbbr rea- reae reak rear reau reba rebb rebe rebk rebu reeb reek reka reke rera rere reru reue reuk reuu rrrr ruba rubb rube rubu ruer ruka ruke rukk ruku rura rure ruru uaru uaua ubar ubba ubbe ubek uber ubra ueba ukba ukek ukeu ukra ukur urau urba urbe ure- urea urka urke urra urre uruk urur uuuu