a-a a-b a-c a-t aaa aab aac aak aas aat aau ab- aba abb abc abk abs abt abu ac- aca acb acc ack acs act acu aka akb akc akk aks aku as- asa asb asc ask ass ast asu at- ata atb atc ats att atu au- aua aub auc auk aus aut b-u baa bab bac bak bas bat bau bba bbb bbc bbk bbs bbt bbu bca bcb bcc bck bcs bct bcu bka bkb bkc bkk bks bkt bsa bsb bsc bsk bss bst bsu bta btb btc btk bts btt btu bua bub buc buk bus but buu c-- caa cab cac cak cas cat cau cba cbb cbc cbk cbs cbt cbu cca ccb ccc cck ccs cct ccu cka ckb ckc cks ckt csa csb csc csk css cst csu cta ctb ctc ctk cts ctt ctu cua cub cuc cuk cus cut cuu k-t ka- kaa kab kac kak kas kat kau kba kbb kbc kbk kbs kbu kca kcb kcc kck kcs kct kcu kkb kkc kkk kks kkt kku ksa ksb ksc ksk kss kst ksu kta ktb ktc ktk kts ktt ktu kub kuc kuk kus kut kuu saa sab sac sak sas sat sau sba sbb sbc sbk sbs sbt sbu sca scb scc sck scs sct scu sk- ska skb skc skk sks skt sku ss- ssa ssb ssc ssk sss sst ssu sta stb stc stk sts stt stu sua sub suc suk sus sut suu taa tab tac tak tas tat tau tba tbb tbc tbk tbs tbt tbu tca tcb tcc tck tcs tct tcu tka tkb tkc tkk tks tkt tsa tsb tsc tsk tss tst tsu tta ttb ttc ttk tts ttt ttu tua tub tuc tuk tus tut tuu ua- uaa uab uac uak uas uat uau uba ubb ubc ubk ubs ubt ubu uca ucb ucc uck ucs uct ucu uka ukb ukc ukk uku usa usb usc usk uss ust usu uta utb utc utk uts utt utu uua uuc uus uut uuu

a-ak aaaa aaab aaac aaas aaba aabb aabc aabt aaca aacb aacc aack aacs aact aacu aaka aaku aasa aasc aass aast aasu aata aatc aatk aatt aaus abaa abab abac abak abas abat abau abb- abba abbb abbs abbt abca abcb abcc abcs abct abs- absa abss absu abta abts abtu abua abuk abus abut ac-t acaa acab acac acas acat acba acca accc accs acct accu acks acsa acsc acss acst acta actc acts actt actu acu- acus acut akaa akas akca akka akku aksa akst aksu akua asaa asab asac asak asas asat asau asba asbu asc- asca ascb ascc asct aska asks askt assa assc assk asss asst assu asta astb astc asts asub asus at-t ataa atab atac atak atas atat atbs atca atcc atck atcs atka atkt atsb atsc atst atta atts attu atua atub atuc atuk atus auaa auca auct auks ausa aust ausu aut- auts baaa baak baas baat baba babb babs babu bac- baca bacc back bacs bact bak- baka baks bakt baku basa basc bask bass bast basu bata batc bats batt batu bau- bauk bbas bbau bbbb bbbs bcaa bcas bcat bcbc bcbs bcca bccc bccs bcsa bcsc bcss bctc bcts bcuc bsaa bsac bsas bsat bscs bskt bssc bsts btaa btcc btcs btss bttb btus buat buba bubb bubs bubu buca bucc buck bucs bucu buka bukk buku busa busc busk buss bust busu but- buta buts butt buus caaa caab caac caas caat caba cabs cabu cac- caca cacc cack caka casa casb casc cask cass cast casu cat- cata catb catc cats catt catu cauc cauk caus caut cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbcu cbka cbsa cbsc cbta cbtc cbus ccaa ccab ccac ccas ccat ccba ccbc ccca cccb cccc cccs cccu ccsa ccss ccst cctb cctc cctt ccuc ccus ccut ckac ckat ckbc ckck ckcs cksa cksb ckst cktb ckts csaa csab csac csak csas csat cscb cscc cscs cska csks cssa csta cstc csts csua csus ctab ctba ctbs ctca ctsa ctsc ctss ctsu ctta ctts cuau cub- cuba cubb cubs cuca cucc cuck cuk- cuka cusa cusb cusk cuss cust cusu cut- cuta cutc cuts cutt kaaa kaab kaak kaas kaat kaba kabb kabc kabu kacb kacc kacs kact kacu kaka kakc kakk kaks kakt kaku kas- kasa kasb kasc kask kass kast kasu kat- kata katb katc katk kats katt katu kau- kaub kauc kauk kaus kbaa kbab kbac kbak kbas kbat kbba kbbb kbbc kbbk kbbs kbbt kbbu kbca kbcb kbck kbcs kbct kbcu kbkb kbkk kbsa kbsb kbsk kbss kbst kbsu kbta kbtb kbtc kbtk kbts kbtt kbua kbub kbuc kbuk kbus kbut kbuu kcaa kcab kcac kcas kcat kcau kcba kcbc kcbk kcbs kcbu kcca kccb kccc kcck kcct kccu kckc kckk kcsa kcsb kcsc kcss kcst kcsu kcta kctb kctc kctu kcua kcub kcuk kkaa kkac kkat kkba kkbb kkbs kkbt kkcb kkck kkcs kkct kkkk kksa kkss kkst kksu kktc kktk kkts kktu kkua kkus kkut kkuu ksab ksac ksak ksas ksat ksau ksba ksbc ksbs ksca kscb ksck kscs kscu kska kskb kskk ksks ksku kssa ksss ksst kssu ksta kstb kstc kstk ksts kstt kstu ksua ksub ksut ksuu ktaa ktak ktas ktat ktba ktbb ktbc ktbt ktbu ktcc ktck ktcs ktkb ktkc ktkk ktks ktkt ktku ktsa ktsc ktst ktsu kttc kttk ktts kttt kttu ktub ktuc kuac kuat kuau kuba kubb kubc kubs kubu kuca kucb kucc kuka kukk kuks kuku kusa kusb kusc kust kusu kuta kuts kutt kutu kuub kuuk kuuu sa-c saab saac saak saas saat saba sabb sabc sabs sabu saca sacc sack sacs sact sacu saka sakb sakk saks saku sasa sasc sask sass sast sata satb satc sats satt satu saua sauc sauk saus saut sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc sbtk sbus scaa scab scac scak scas scat scba sccc sccs scct sck-