a-ak a-be aaaa aaab aaae aaap aaba aabb aabp aabt aaea aaep aaka aake aapa aapt aata aatk aatt abaa abab abae abak abap abat abb- abba abbb abbe abbt abee abet abpa abpp abta aeap aeka aeta aett akaa akae akap akee akka akte apak apap apat apba apea apep apet apke appa appt apta apte aptt at-t ataa atab atae atak atap atat atea atee atep atka atkt atta atte attp baaa baak baat baba babb babe baek bak- baka bake bakt bapa bape bapp bapt bata bate batt bbbb bbeb bbet beak beap beat beba bebb bebe beeb beek beep beet beka beke beta bete bett bkpt bpea btaa btbp btek bttb eaba eapp eata eate ebba eeea eeee eeka eeke eeta eete eka- ekab ekeb ekek eket ekka ekpe ekta epaa epee eppa eppp epta epte etak etap etat etee etka etta ette kaaa kaab kaak kaap kaat kaba kabb kabe kaep kaet kaka kake kakk kakt kap- kapa kape kapp kapt kat- kata katb kate katk katp katt kbaa kbab kbae kbak kbap kbat kbba kbbb kbbe kbbk kbbt kbeb kbee kbek kbet kbkb kbkk kbpa kbpe kbpk kbpt kbta kbtb kbte kbtk kbtt kea- keak keap keat keba kebb kebe kebt keek keep keet keka kekb keke kep- kepa kepe kept ket- keta kete ketk ketp kett kkaa kkap kkat kkba kkbb kkbe kkbt kkea kkkk kkpk kkpt kktk kpae kpak kpat kpba kpbb kpbe kpek kpet kpke kpkk kppk kppp kpte kptt ktaa ktae ktak ktap ktat ktba ktbb ktbt ktea ktee ktek ktep ktkb ktke ktkk ktkt ktpa ktpk ktpt kttk kttp kttt paak paap paat paba pabt paea paep paka pake papa papb pape papp pata pate patt pbpa pbpk peab peak peap peat peba peek peep peet peka peke pekk pepa pepe peta pete pett ppap pppa pppp ppta pptt ptab ptak pttk taa- taat taba tabb tabe taka take takk takt tapa tape tapp tapt tata tatb tate tatt tbta tbtp teak teat teba teek teet teka teke tepa tepe tepp teta tete tett tpap tpke tppa tppp tpte tptp ttab ttbb tttt