a-ak aaaa aaab aaac aaap aaas aaba aabb aabc aabp aaca aacb aacc aack aacp aacs aacu aaka aaku aapa aapc aaps aasa aasc aass aasu aaup aaus abaa abab abac abak abap abas abau abb- abba abbb abbs abca abcb abcc abcp abcs abpa abpc abpp abps abs- absa absp abss absu abua abuk abus acaa acab acac acap acas acba acca accc accp accs accu acks acpa acps acpu acsa acsc acss acu- acup acus akaa akap akas akca akka akku akpu akqa aksa aksu akua apac apak apap apas apba apbs apca apcb apcc apcs appa appc apps appu apsa apss apsu apua apuc apup apus aqap aqas aqps aqsa aqu- aqua asaa asab asac asak asap asas asau asba asbu asc- asca ascb ascc ascp ascq aska asks aspa aspc asps asqc assa assc assk assp assq asss assu asub asus auaa auca aucp auks aupc aups ausa ausu baaa baak baas baba babb babs babu bac- baca bacc back bacs bak- baka baks baku bapa bapc bapp baps bapu baqa basa basc bask bass basu bau- bauk bbas bbau bbbb bbbq bbbs bbqs bcaa bcap bcas bcbc bcbp bcbs bcca bccc bccs bcpp bcps bcsa bcsc bcss bcuc bcup bksp bpcp bpsa bpsu bsaa bsac bsap bsas bscp bscs bspp bssc bsup buba bubb bubq bubs bubu buca bucc buck bucs bucu buka bukk buku bupa bupc bups buqa busa busc busk buss busu buus caaa caab caac caap caas caba cabs cabu cac- caca cacc cack caka capa capb capc capp caps capu casa casb casc cask casp cass casu cauc cauk caup caus cbac cbbc cbbs cbca cbcc cbcp cbcs cbcu cbka cbpc cbpp cbsa cbsc cbus ccaa ccab ccac ccap ccas ccba ccbc ccca cccb cccc cccp cccs cccu ccpa ccpp ccps ccsa ccsp ccss ccuc ccup ccus ckac ckbc ckck ckcs ckpc cksa cksb cpaa cpac cpap cpas cpbc cpca cpcs cpcu cppa cpps cpsa cpsc cpsk cpsu cpus csaa csab csac csak csas cscb cscc cscs cska csks cspa cspb cspc csps cssa csua csup csus cuau cub- cuba cubb cubs cuca cucc cuck cucq cuk- cuka cupp cups cusa cusb cusk cusp cuss cusu kaaa kaab kaak kaap kaaq kaas kaba kabb kabc kabq kabu kacb kacc kacp kacq kacs kacu kaka kakc kakk kaks kaku kap- kapa kapc kapp kaps kapu kas- kasa kasb kasc kask kasp kass kasu kau- kaub kauc kauk kaup kaus kbaa kbab kbac kbak kbap kbaq kbas kbba kbbb kbbc kbbk kbbs kbbu kbca kbcb kbck kbcq kbcs kbcu kbkb kbkk kbpa kbpc kbpk kbps kbpu kbqb kbsa kbsb kbsk kbsq kbss kbsu kbua kbub kbuc kbuk kbup kbus kbuu kcaa kcab kcac kcap kcaq kcas kcau kcba kcbc kcbk kcbq kcbs kcbu kcca kccb kccc kcck kccu kckc kckk kcpa kcpc kcpq kcps kcpu kcqq kcsa kcsb kcsc kcsp kcss kcsu kcua kcub kcuk kcup kkaa kkac kkap kkaq kkba kkbb kkbq kkbs kkcb kkck kkcq kkcs kkkk kkpc kkpk kkps kkqq kksa kksp kkss kksu kkua kkup kkus kkuu kpac kpak kpas kpau kpba kpbb kpbs kpcc kpcs kpkk kppc kppk kppp kpsc kpsp kpsu kpua kpub kpus kqac kqak kqaq kqba kqbb kqbk kqbu kqca kqck kqcs kqkk kqks kqqa kqqk kqqq kqqs kqsc kqsk kqsp kqss kqup ksab ksac ksak ksaq ksas ksau ksba ksbc ksbp ksbq ksbs ksca kscb ksck kscq kscs kscu kska kskb kskk kskq ksks ksku kspa kspb kspc kspk kspq ksps ksqa ksqb ksqq ksqs kssa kssq ksss kssu ksua ksub ksup ksuu kuac kuap kuau kuba kubb kubc kubq kubs kubu kuca kucb kucc kucp kuka kukk kuks kuku kupa kupb kups kupu kuqq kusa kusb kusc kusp kusq kusu kuub kuuk kuuu paak paap paas paba pabu paca pack pacs pacu paka paks paku papa papb papp paps pasa pasc pask pasp pass paua pauk paup paus pbac pbcc pbpa pbpk pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcks pcpb pcpp pcps pcsa pkcs ppac ppap ppcc ppcs pppa pppp ppps ppss pqcc psac psap psas psca pscu pspp psps pssa pssc puas pubs pubu puca puck puka puku pupa pups pupu pusa pusk puss puuc qa-c qass qppb qqqq qsas qsqs quaa quab quap quas quba qucu quu- sa-c saab saac saak saap saas saba sabb sabc sabs sabu saca sacc sack sacs sacu saka sakb sakk saks saku sapa sapp saps sasa sasc sask sass saua sauc sauk saup saus sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbsp sbus scaa scab scac scak scap scas scba sccc sccp sccs sck- scpa scpb scps scsa scsc scsu scua scub scup skab skac skap skpc skss skua skup sp-a spac spak spap spas spau spca spcc spcs spps spsa spsp spss spus ssaa ssab ssac ssap ssas ssau ssca sscc sscp sscs sspa sspc ssps sssa sssb sssc ssss suas sub- suba subb subs suc- succ suck sucs suka suks suku sup- supa supp sups suqs sus- susa susk susp suss susu suus uabc uaca uasa uasp uaua ubac ubba ubpc ucak ucas ucbc ucca uccp ucka ucpa ucpb ucsa ucsb ucsc ucsu ucua ukba ukcc ukpa ukps uksa uksc ukup upac upas upca upcs uppa uppc uppp uppu upsa upsc upup uqac uqcc us-a us-k usaa usac usak usap usas usba usbc usbs usca uscc uscs uska uspa uspc uspp usps ussa ussb ussc usss ussu usua usus uucp uuuu