a-ak a-be a-ii aaaa aaab aaac aaae aaai aaap aaba aabb aabc aabi aabp aaca aacb aacc aace aaci aack aacp aaea aaec aaep aaib aaic aaii aaka aake aapa aapc aapi abaa abab abac abae abai abak abap abb- abba abbb abbe abbi abca abcb abcc abci abcp abec abee abia abib abic abie abpa abpc abpi abpp acaa acab acac acae acai acap acba acca accc acce acci accp ace- acea acec acek aci- acia acic acie acip acke acpa acpe acpi aeac aeap aebi aecb aeci aeka aiai aiba aica aicc aice aicp aiea aiee aiia aiib aiic aika aike aiki aipa aipe aipi akaa akae akai akap akca akee akia akie akik akka akki apac apai apak apap apba apca apcb apcc apea apec apep api- apia apic apie apip apke appa appc ba-i baaa baak baba babb babe babi bac- baca bacc bace baci back baek baia baib baic baie baik bak- baka bake baki bapa bapc bape bapi bapp bbbb bbci bbeb bcaa bcap bcbc bcbp bcca bccc bcci bcec bcia bcie bcpp beak beap beba bebb bebe bebi beca beci beck beeb beek beep beia beic beik beka beke beki biak biap biba bibb bibe bibi bica bicc bice bici bick bieb bike bipa bipp bpai bpcp bpea caaa caab caac caap caba cabe cabi cac- caca cacc cace caci cack caec caei caia caib caic caik caip caka cake capa capb capc cape capi capp cbac cbbc cbca cbcc cbce cbcp cbea cbec cbee cbia cbka cbpc cbpp ccaa ccab ccac ccai ccap ccba ccbc ccca cccb cccc ccci cccp ccee ccic ccii ccip ccpa ccpe ccpp ceac ceba cebp cec- ceca cece ceci cecp ceeb ceec ceip ceke cepa cepc cepe cepp ciaa ciak ciba cibc cibe cibi cica cicc cici ciee ciia ciii cika cipa cipp ckac ckbc ckbe ckbi ckck ckpc cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cpia cpic cppa eaba eaca eacc eaec eapc eapp ebac ebba ebbc ebcc ebic ecaa ecac ecai ecbc ecbe ecca eccb eccc ecce ecci ecib ecip ecka ecpa ecpp eeca eeea eeee eeka eeke eica eick eiec eiei eika eike eiki eka- ekab ekeb ekek ekka ekki ekpe epaa epac epcc epci epec epee epi- epia epic epie epik epip eppa eppc eppp i-be iaaa iaac iaai iaap iaba iaca iacc iacp iaea iaec iaep iaia iapa iapp ibac ibca ibea ibec ibia ibie icaa icab icac icai icap icbc icbp icca iccb iccc icci iccp icea icec icee icke icpa icpc ieac iecc ieie iepa iiac iica iiie iiii iipa ikea ikee ikki ipac ipak ipba ipbk ipca ipcc ipce ipea ipec ipek ipie ippa ippc k-ci kaaa kaab kaai kaak kaap kaba kabb kabc kabe kabi kacb kacc kace kaci kacp kaei kaep kaia kaib kaic kaie kaii kaik kaip kaka kakc kake kaki kakk kap- kapa kapc kape kapi kapp kbaa kbab kbac kbae kbai kbak kbap kbba kbbb kbbc kbbe kbbi kbbk kbca kbcb kbce kbci kbck kbeb kbec kbee kbek kbia kbib kbic kbie kbik kbkb kbkk kbpa kbpc kbpe kbpi kbpk kcaa kcab kcac kcai kcap kcba kcbc kcbi kcbk kcca kccb kccc kcci kcck kcea kceb kcec kcee kcei kcep kcic kcie kcii kckc kckk kcpa kcpc kcpi kea- keak keap keba kebb kebc kebe kebi keca keck keek keep keib keii keik keka kekb kekc keke keki kep- kepa kepc kepe kepi kiab kiac kiai kiap kiba kibb kibc kibe kibi kica kicb kicc kice kick kicp kiia kiic kiii kiik kiip kika kikc kiki kikk kip- kipa kipe kipi kipp kkaa kkac kkai kkap kkba kkbb kkbe kkbi kkcb kkci kkck kkea kkia kkic kkik kkkk kkpc kkpk kpac kpae kpak kpba kpbb kpbe kpbi kpcc kpek kpia kpke kpkk kppc kppk kppp paak paap paba paca pace paci pack paea paec paep paia paib paie paik paip paka pake paki papa papb pape papi papp pbac pbcc pbpa pbpk pcaa pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcia pcip pcpb pcpp peab peac peai peak peap peba peca pece peci peck peec peek peep peia peip peka peke peki pekk pepa pepe pepi piai pibb pibi pica picc pice pici pick piea piep piia piip pika pike piki pikk pipa pipe pipi pipp pkia pkib ppac ppap ppcc ppci ppib ppic ppie pppa pppp