a-ak a-be aaaa aaab aaae aaap aaar aaba aabb aabp aaea aaep aaka aake aapa aara aare aarp abaa abab abae abak abap abar abb- abba abbb abbe abbr abee aber abpa abpp abpr abra aeap aeer aeka aer- aera akaa akae akap akar akee aker akka akr- akra akre apak apap apar apba apbr apea apep aper apke appa appr apra apre arab arae arak arap arar arba arbe area aree arek arep arka arke arpa arpe arr- arra arre arrk arrr baaa baak baar baba babb babe babr baek baer bak- baka bake bakr bapa bape bapp bar- bara barb bare bark barr bbbb bbeb bbpr beak beap bear beba bebb bebe beeb beek beep beer beka beke bera bere berk berr bkpr bpea brab brae brak brea breb bree brek brep brer brka brkb brrr eaba eapp eara earb eare earp ebba ebbr eber eeea eeee eeka eeke eera eka- ekab ekeb ekek eker ekka ekpe epaa epee eper eppa eppp epra eprb eprp erap erba erbb erbe ereb erer erke erpa erpe erra erre kaaa kaab kaak kaap kaar kaba kabb kabe kabr kaep kaer kaka kake kakk kap- kapa kape kapp kara karb kare kark karp karr kbaa kbab kbae kbak kbap kbar kbba kbbb kbbe kbbk kbbr kbeb kbee kbek kber kbkb kbkk kbkr kbpa kbpe kbpk kbpr kbra kbrb kbre kbrk kea- keak keap kear keba kebb kebe kebr keek keep keer keka kekb keke kep- kepa kepe ker- kera kerb kere kerk kerp kerr kkaa kkap kkar kkba kkbb kkbe kkbr kkea kkkk kkpk kkrb kkre kkrk kkrr kpae kpak kpar kpba kpbb kpbe kpbr kpek kper kpke kpkk kpkr kppk kppp kppr kprb kpre kprk kprp kprr krab krae krak krap krar krba krbb krbe krbk krbr krea kreb kree krek krka krke krkk krkr krpa krpr krrb krre krrk krrr paak paap paar paba paea paep paer paka pake papa papb pape papp papr par- para pare park parp parr pbar pbpa pbpk peab peak peap pear peba peek peep peer peka peke pekk pepa pepe per- pera pere perk perp perr ppap ppar pper pppa pppp prae prar pre- preb pree prek prep raab raak raba rabb rabe rabk raep raer raka rake rakk rapa rape rapp rara rarb rare rark rbbb rbbr rea- reae reak reap rear reba rebb rebe rebk reeb reek reep reka reke repe repp repr rera rere rrrr