a-ak a-be a-ok aaaa aaab aaac aaae aaaf aaap aaba aabb aabc aabp aaca aacb aacc aace aacf aack aaco aacp aaea aaec aaep aafa aafb aafc aaff aaka aake aaoe aaoo aapa aapc aapo abaa abab abac abae abaf abak abap abb- abba abbb abbe abbo abca abcb abcc abcf abcp abec abee abff aboa abob abof abok aboo abpa abpc abpp acaa acab acac acae acap acba acca accc acce accf acco accp ace- acea acec acek acfc acfe acke acoa acoe acop acpa acpe aeac aeaf aeap aecb aeka afaa afak afao afap afca afcb afcc afee afek affa affc affo afka afoa afoe afoo afpa afpc afpe akaa akae akao akap akca akee akka akko akok akpo aoba aoca aoce aokp aopo apac apak apao apap apba apca apcb apcc apco apea apec apep apfa apfc apfo apke apo- apoc apoe apof apoo apop appa appc baaa baaf baak baba babb babe babo bac- baca bacc bace back baco baek bafc baff bafo bak- baka bake bako bapa bapc bape bapp bbbb bbeb bbfc bcaa bcap bcbc bcbp bcca bccc bcec bcfc bcof bcpp beaf beak beap beba bebb bebe bebo beca beck beeb beef beek beep befa befe beff befo beka beke beko beo- beof beok bepo bfca bfpo bfpp boab boac boak boba bobb bobe bobo boca boce bock boco boea boec boee boef boeo boep bofa bofe boff boka boke boko boob booc booe boof book boop bopa bope bopp bpcp bpea bpfc bpoe c-bo caaa caab caac caaf caap caba cabe cabf cabo cac- caca cacc cace cack caco caec cafa cafb cafc cafe caff caka cake capa capb capc cape capo capp cbac cbbc cbca cbcc cbce cbcp cbea cbec cbee cbef cbfb cbfc cbka cbko cbpc cbpp ccaa ccab ccac ccaf ccap ccba ccbc ccca cccb cccc cccf cccp ccee ccfa ccfc ccff ccob ccoc ccpa ccpe ccpp ceac ceba cebp cec- ceca cece ceco cecp ceeb ceec cef- cefa cefc ceke ceop cepa cepc cepe cepo cepp cfaa cfab cfac cfae cfao cfbc cfca cfcb cfcf cfco cffb cfoa cfpa cfpo ckac ckbc ckbe ckck ckco ckoa ckob ckoc ckoo ckpc coak coba cobb cobe cobo coca coce cock coco cocp coep cofc cofe coff cok- coka coke coko coob coof cook coop copa cope copo copp cpaa cpac cpaf cpap cpbc cpca cpce cpea cpeb cpep cpff cppa eaaf eaba eaca eacc eaec eafb eaop eapc eapp ebac ebba ebbc ebbo ebcc ebfc eboe eboo ebpo ecaa ecac ecao ecbc ecbe ecca eccb eccc ecce ecco ecef ecfa ecfc ecka ecko eco- ecop ecpa ecpp eeca eeea eeee eefa eefe eeka eeke eeoc efab efca efco efeo effa efke efpa eka- ekab ekco ekeb ekek ekfc ekka ekoa ekpe ekpo eoka epaa epac epcc epec epee epfa epfc epoc eppa eppc eppo eppp f--k faaa faac faap faba fabe fabo faca facc face fack facp faeb fafa fafc fafe faff fafo fake fako fapa fape fapp fbop fcab fcap fcba fcca fccf fccp fcpa feaf feak feap feba febo fece feck feeb feek fefc fefe feff fefo feke feko feof fepa fepc ffcc ffee ffff fkab fkbp foaf foak foba foca foce fock foco fofo foke foof fook fopp fp-c fpaa fpcc kaaa kaab kaaf kaak kaap kaba kabb kabc kabe kabf kabo kacb kacc kace kaco kacp kaeo kaep kafa kafc kafe kaff kafp kaka kakc kake kakk kako kaoa kaoc kaok kap- kapa kapc kape kapf kapo kapp kbaa kbab kbac kbae kbak kbap kbba kbbb kbbc kbbe kbbf kbbk kbbo kbca kbcb kbce kbck kbco kbeb kbec kbee kbef kbek kbeo kbfb kbfc kbff kbfk kbfo kbfp kbkb kbkf kbkk kbko kboa kbob kboc kboe kbok kboo kbpa kbpc kbpe kbpk kbpo kcaa kcab kcac kcap kcba kcbc kcbf kcbk kcca kccb kccc kcck kcea kceb kcec kcee kceo kcep kcfa kcfb kcfc kcfo kcfp kckc kckf kckk kcko kcob kcoe kcof kcpa kcpc kcpo kea- keak keap keba kebb kebc kebe keca keck keco keef keek keep kefa kefb kefc keff keka kekb kekc keke keko keok kep- kepa kepc kepe kfab kfac kfbc kfbk kfcf kfco kfeb kffa kffb kfff kffk kfka kfkb kfok kfoo kkaa kkac kkap kkba kkbb kkbe kkbo kkcb kkck kkco kkea kkkk kkoa kkob kkoo kkpc kkpk koab koac koae koak koap koba kobb kobc kobe kobk kobo koca kocb kocf kock kocp koea kofa kofc kofe koff kofk kofo kofp koka kokb kokc koke kokf kokk koko kokp koob kooc kook kooo koop kopa kopb kope kopf kopp kpac kpae kpak kpao kpba kpbb kpbe kpcc kpek kpfa kpfc kpfk kpke kpkk kpoa kpob kpoc kpoe kpof kpok kpoo kpop kppc kppk kppo kppp o-eo oafc oafo oake obak obba obbo obea obec obkb oboe obok ocab ocac ocak ocap ocbc occa occc oce ocee ocef ocfa ocfp ocke ocpa ocpp oec- oeca oecc oeec oepa ofek off- offa offc offe offo okak okap okka okko okok okpe okpo ooaa ooak ooba oobe ooff oooo opap opca opec opep opo- oppa oppo paak paap paba paca pace pack paco paea paec paep pafa pafc pafe paff paka pake pako paoc papa papb pape papp pbac pbcc pboc pbpa pbpk pcaa pcae pcaf pcap pcba pcbc pcca pccc pcce pcea pcep pcfc pcoa pcoe pcpb pcpp peab peac peak peap peba peca pece peck peco peec peek peep pefc peff peka peke pekk peko pepa pepe pepo pfaa pfcb pfce pfff pfkp poak poba pobo poca poce pock poco poea poff poka poke poko poof pook poop pop- popa popc pope popo popp ppac ppap ppcc ppfa ppoa pppa pppo pppp