a-a a-b a-c aaa aab aac aak aas aau ab- aba abb abc abk abs abu ac- aca acb acc ack acs acu aka akb akc akk aks aku as- asa asb asc ask ass asu au- aua aub auc auk aus b-u baa bab bac bak bas bau bba bbb bbc bbk bbs bbu bca bcb bcc bck bcs bcu bka bkb bkc bkk bks bsa bsb bsc bsk bss bsu bua bub buc buk bus buu c-- caa cab cac cak cas cau cba cbb cbc cbk cbs cbu cca ccb ccc cck ccs ccu cka ckb ckc cks csa csb csc csk css csu cua cub cuc cuk cus cuu ka- kaa kab kac kak kas kau kba kbb kbc kbk kbs kbu kca kcb kcc kck kcs kcu kkb kkc kkk kks kku ksa ksb ksc ksk kss ksu kub kuc kuk kus kuu saa sab sac sak sas sau sba sbb sbc sbk sbs sbu sca scb scc sck scs scu sk- ska skb skc skk sks sku ss- ssa ssb ssc ssk sss ssu sua sub suc suk sus suu ua- uaa uab uac uak uas uau uba ubb ubc ubk ubs ubu uca ucb ucc uck ucs ucu uka ukb ukc ukk uku usa usb usc usk uss usu uua uuc uus uuu

a-ak aaaa aaab aaac aaas aaba aabb aabc aaca aacb aacc aack aacs aacu aaka aaku aasa aasc aass aasu aaus abaa abab abac abak abas abau abb- abba abbb abbs abca abcb abcc abcs abs- absa abss absu abua abuk abus acaa acab acac acas acba acca accc accs accu acks acsa acsc acss acu- acus akaa akas akca akka akku aksa aksu akua asaa asab asac asak asas asau asba asbu asc- asca ascb ascc aska asks assa assc assk asss assu asub asus auaa auca auks ausa ausu baaa baak baas baba babb babs babu bac- baca bacc back bacs bak- baka baks baku basa basc bask bass basu bau- bauk bbas bbau bbbb bbbs bcaa bcas bcbc bcbs bcca bccc bccs bcsa bcsc bcss bcuc bsaa bsac bsas bscs bssc buba bubb bubs bubu buca bucc buck bucs bucu buka bukk buku busa busc busk buss busu buus caaa caab caac caas caba cabs cabu cac- caca cacc cack caka casa casb casc cask cass casu cauc cauk caus cbac cbbc cbbs cbca cbcc cbcs cbcu cbka cbsa cbsc cbus ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccs cccu ccsa ccss ccuc ccus ckac ckbc ckck ckcs cksa cksb csaa csab csac csak csas cscb cscc cscs cska csks cssa csua csus cuau cub- cuba cubb cubs cuca cucc cuck cuk- cuka cusa cusb cusk cuss cusu kaaa kaab kaak kaas kaba kabb kabc kabu kacb kacc kacs kacu kaka kakc kakk kaks kaku kas- kasa kasb kasc kask kass kasu kau- kaub kauc kauk kaus kbaa kbab kbac kbak kbas kbba kbbb kbbc kbbk kbbs kbbu kbca kbcb kbck kbcs kbcu kbkb kbkk kbsa kbsb kbsk kbss kbsu kbua kbub kbuc kbuk kbus kbuu kcaa kcab kcac kcas kcau kcba kcbc kcbk kcbs kcbu kcca kccb kccc kcck kccu kckc kckk kcsa kcsb kcsc kcss kcsu kcua kcub kcuk kkaa kkac kkba kkbb kkbs kkcb kkck kkcs kkkk kksa kkss kksu kkua kkus kkuu ksab ksac ksak ksas ksau ksba ksbc ksbs ksca kscb ksck kscs kscu kska kskb kskk ksks ksku kssa ksss kssu ksua ksub ksuu kuac kuau kuba kubb kubc kubs kubu kuca kucb kucc kuka kukk kuks kuku kusa kusb kusc kusu kuub kuuk kuuu sa-c saab saac saak saas saba sabb sabc sabs sabu saca sacc sack sacs sacu saka sakb sakk saks saku sasa sasc sask sass saua sauc sauk saus sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbus scaa scab scac scak scas scba sccc sccs sck- scsa scsc scsu scua scub skab skac skss skua ssaa ssab ssac ssas ssau ssca sscc sscs sssa sssb sssc ssss suas sub- suba subb subs suc- succ suck sucs suka suks suku sus- susa susk suss susu suus uabc uaca uasa uaua ubac ubba ucak ucas ucbc ucca ucka ucsa ucsb ucsc ucsu ucua ukba ukcc uksa uksc us-a us-k usaa usac usak usas usba usbc usbs usca uscc uscs uska ussa ussb ussc usss ussu usua usus uuuu

-aaa- aaaas aaasa aaass aabaa aabba aacbc aacsa aacsb aacss aacus abaab ababa ababs ababu abaca aback abacs abaka abasa abask abass abbac abbas abcas abccc acaca acacb acack acass acaua accas accub accus acuba acusa akaba akasa akbas akbuk akkas akkub akuku asaak asaba asabc asack asaka asasa asbak asbca ascus askas asksa askus assab assac assas asubs asuka auass aubas aucas aussa b-cas babak babas babau babbs babka babsk babus bacab bacas bacca back- backa backs bacu bakau bakka baksa basab basak basca baska basks bassa bassu bbuss bsaba bubas bubba bubka bucak bucca bucka bucks bucku bucsa bucsu bukac bukk- buksa busaa busca busks bussa bussu busua busuu c-a-c c-bus ca-ca caaba cabas cabus cacak cacas cacau cacks cacu cacus casas casca casks casus cauac cauas cauca cauks causa ccass ccccc csaba cuaba cubas cubub cucks cucuk cukas cuska cusks kaaba kaabu kaaks kabaa kabab kabak kabas kabba kabsa kabua kakas kakau kakka kakku kakus kasab kasak kasba kaska kassa kassu kausa kuaka kubau kubba kucuk kukak kukas kukka kuksu kukua kuusk s-bus saaba saabs saasa saasu sabac sabak sabas sabau sabca sabsa sabuk sabus sacas sacc- sacca sacks sacsa sakac sakka saksa sakuk sasak sasca saska sassa sauba sauca sauka sauks sback sbuks scabs sccbc scsaa scuba scusa skabu skuas sscac sssss suaku suasa subak subba subbu subss subuk suck- sucka sucks sucua sukaa sukuk susac susak susuk susus ubacs us-ks us-sc usaas usabc usack ussac usuba usuka uuuuu

aaaaba ababsa abacab abacas abacks abacus abakas abassa abbasa abbass abscss abubus abusua acacus acasa ackack ak-suu akaska akassa akbaba akkaba akkus akuaba akuaku asakku assacu assaka assaku aucuba ausbbs aussac baabaa babacu babkas bacaba