a-ak a-ii aaaa aaab aaac aaai aaap aaba aabb aabc aabi aabp aaca aacb aacc aaci aack aacp aaib aaic aaii aaka aapa aapc aapi abaa abab abac abai abak abap abb- abba abbb abbi abca abcb abcc abci abcp abia abib abic abpa abpc abpi abpp acaa acab acac acai acap acba acca accc acci accp aci- acia acic acip acpa acpi aiai aiba aica aicc aicp aiia aiib aiic aika aiki aipa aipi akaa akai akap akca akia akik akka akki apac apai apak apap apba apca apcb apcc api- apia apic apip appa appc ba-i baaa baak baba babb babi bac- baca bacc baci back baia baib baic baik bak- baka baki bapa bapc bapi bapp bbbb bbci bcaa bcap bcbc bcbp bcca bccc bcci bcia bcpp biak biap biba bibb bibi bica bicc bici bick bipa bipp bpai bpcp caaa caab caac caap caba cabi cac- caca cacc caci cack caia caib caic caik caip caka capa capb capc capi capp cbac cbbc cbca cbcc cbcp cbia cbka cbpc cbpp ccaa ccab ccac ccai ccap ccba ccbc ccca cccb cccc ccci cccp ccic ccii ccip ccpa ccpp ciaa ciak ciba cibc cibi cica cicc cici ciia ciii cika cipa cipp ckac ckbc ckbi ckck ckpc cpaa cpac cpap cpbc cpca cpia cpic cppa iaaa iaac iaai iaap iaba iaca iacc iacp iaia iapa iapp ibac ibca ibia icaa icab icac icai icap icbc icbp icca iccb iccc icci iccp icpa icpc iiac iica iiii iipa ikki ipac ipak ipba ipbk ipca ipcc ippa ippc k-ci kaaa kaab kaai kaak kaap kaba kabb kabc kabi kacb kacc kaci kacp kaia kaib kaic kaii kaik kaip kaka kakc kaki kakk kap- kapa kapc kapi kapp kbaa kbab kbac kbai kbak kbap kbba kbbb kbbc kbbi kbbk kbca kbcb kbci kbck kbia kbib kbic kbik kbkb kbkk kbpa kbpc kbpi kbpk kcaa kcab kcac kcai kcap kcba kcbc kcbi kcbk kcca kccb kccc kcci kcck kcic kcii kckc kckk kcpa kcpc kcpi kiab kiac kiai kiap kiba kibb kibc kibi kica kicb kicc kick kicp kiia kiic kiii kiik kiip kika kikc kiki kikk kip- kipa kipi kipp kkaa kkac kkai kkap kkba kkbb kkbi kkcb kkci kkck kkia kkic kkik kkkk kkpc kkpk kpac kpak kpba kpbb kpbi kpcc kpia kpkk kppc kppk kppp paak paap paba paca paci pack paia paib paik paip paka paki papa papb papi papp pbac pbcc pbpa pbpk pcaa pcap pcba pcbc pcca pccc pcia pcip pcpb pcpp piai pibb pibi pica picc pici pick piia piip pika piki pikk pipa pipi pipp pkia pkib ppac ppap ppcc ppci ppib ppic pppa pppp