a-ak a-be aaaa aaab aaae aaar aaba aabb aaea aaka aake aara aare abaa abab abae abaj abak abar abb- abba abbb abbe abbr abee aber abra aeer aeka aer- aera ajab ajak ajar ajba ajee ajka akaa akae akar akee aker akka akr- akra akre arab arae arak arar arba arbe area aree arek arja arje arka arke arr- arra arre arrk arrr baaa baak baar baba babb babe babr baek baer baja bak- baka bake bakr bar- bara barb bare bark barr bbbb bbeb beak bear beba bebb bebe beeb beej beek beer beja beka beke bera bere berk berr brab brae braj brak brea breb bree brek brer brje brka brkb brrr eaba eara earb eare ebba ebbr eber eeea eeee eeka eeke eera ejer eka- ekab ekeb ekek eker ekka erba erbb erbe ereb erer erja erke erra erre jaak jaar jaba jabr jaer jaja jaka jake jara jare jark jarr jbaa jbar jear jebb jebe jeer jeke jera jere jerk jjar jrbr kaaa kaab kaak kaar kaba kabb kabe kabr kaer kaja kajb kaje kajk kajr kaka kake kakj kakk kara karb kare karj kark karr kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbk kbbr kbeb kbee kbek kber kbja kbjk kbkb kbkk kbkr kbra kbrb kbre kbrj kbrk kea- keak kear keba kebb kebe kebr keek keer kejb kejj keka kekb keke ker- kera kerb kere kerk kerr kjaa kjae kjak kjbb kjbr kjee kjer kjjj kjjk kjjr kjke kjkj kjkk kjrb kkaa kkar kkba kkbb kkbe kkbj kkbr kkea kkjb kkjk kkkj kkkk kkrb kkre kkrk kkrr krab krae kraj krak krar krba krbb krbe krbk krbr krea kreb kree krej krek krjb krje krjk krka krke krkk krkr krrb krre krrk krrr raab raaj raak raba rabb rabe rabk raer raja raje raka rake rakk rara rarb rare rark rbbb rbbr rea- reae reak rear reba rebb rebe rebk reeb reek reja reka reke rera rere rrrr