a-ak a-be aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aaea aaka aake aara aard aare abaa abab abad abae abak abar abb- abba abbb abbe abbr abda abed abee aber abra adaa adab adad adae adak adar adba adda addd adde addr adea adeb adee ader adra adre aede aeer aeka aer- aera aerd akaa akae akar aked akee aker akka akr- akra akre arab arad arae arak arar arba arbe arda arde area ared aree arek arka arke arr- arra arre arrk arrr baaa baad baak baar baba babb babe babr bada badb badd bade badr baed baek baer bak- baka bake bakr bar- bara barb bard bare bark barr bbad bbbb bbdd bbeb bd-r bead beak bear beba bebb bebe beda bede beeb beed beek beer beka beke bera berd bere berk berr brab brad brae brak brda brea breb bred bree brek brer brka brkb brrr daab daad daae daar daba dabb dada dade daeb daer daka dake dara darb dard dare dark darr dbar dddd ddre dead deae deak dear deba debe deda dedd dede deeb deed deek deer dek- deka deke der- dera derb dere derk derr dkba draa drab drad drak drar drba drda drea dred dree drek drra eaba eada eadb eadd eara earb eard eare ebba ebbr ebed eber edad edar edda edde ede- edea eder edra eede eeea eeee eeka eeke eera eka- ekab ekeb eked ekek eker ekka erad erba erbb erbe erda erde ereb ered erer erke erra erre kaaa kaab kaak kaar kaba kabb kabd kabe kabr kad- kada kadd kade kadr kaer kaka kake kakk kara karb kard kare kark karr kbaa kbab kbad kbae kbak kbar kbba kbbb kbbd kbbe kbbk kbbr kbdb kbde kbdr kbeb kbed kbee kbek kber kbkb kbkk kbkr kbra kbrb kbrd kbre kbrk kdaa kdab kdad kdae kdak kdar kdbb kdbr kddb kddd kddk kddr kdeb kdka kdkb kdkd kdkk kdkr kdrb kea- kead keak kear keba kebb kebe kebr keda kedb kedd kede kedr keed keek keer keka kekb keke ker- kera kerb kere kerk kerr kkaa kkar kkba kkbb kkbd kkbe kkbr kkda kkdd kkea kked kkkk kkrb kkre kkrk kkrr krab krad krae krak krar krba krbb krbd krbe krbk krbr krda krdd krde krdr krea kreb kred kree krek krka krkd krke krkk krkr krrb krre krrk krrr raab raad raak raba rabb rabe rabk rada radd rade radr raed raer raka rake rakk rara rarb rare rark rbbb rbbr rder rea- read reae reak rear reba rebb rebe rebk reda redd rede redr reeb reed reek reka reke rera rerd rere rrad rred rrrr