a-ak aaaa aaab aaac aaas aaba aabb aabc aabt aaca aacb aacc aack aacs aact aaka aasa aasc aass aast aata aatc aatk aatt abaa abab abac abag abak abas abat abb- abba abbb abbs abbt abca abcb abcc abcs abct abs- absa abss abta abts ac-t acaa acab acac acag acas acat acba acca accc accs acct acga acgs acks acsa acsc acss acst acta actc actg acts actt agac agag agas agat agba agca agcc agct agga agsa agsg agst agta agts akaa akas akca akka aksa akst asaa asab asac asag asak asas asat asba asc- asca ascb ascc asct asgt aska asks askt assa assc assk asss asst asta astb astc asts at-t ataa atab atac atak atas atat atbs atca atcc atck atcs atka atkt atsb atsc atst atta atts baaa baak baas baat baba babb babs bac- baca bacc back bacs bact baga bagg bags bagt bak- baka baks bakt basa basc bask bass bast bata batc bats batt bbas bbbb bbbs bbga bcaa bcas bcat bcbc bcbg bcbs bcca bccc bccs bcgs bcsa bcsc bcss bctc bcts bgca bggs bgst bsaa bsac bsas bsat bscs bsgs bskt bssc bsts btaa btcc btcs btss bttb caaa caab caac caas caat caba cabg cabs cac- caca cacc cack caga cagg cags caka casa casb casc cask cass cast cat- cata catb catc cats catt cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbga cbgb cbka cbkg cbsa cbsc cbta cbtc ccaa ccab ccac ccag ccas ccat ccba ccbc ccca cccb cccc cccs ccga ccgc ccgs ccgt ccsa ccsg ccss ccst cctb cctc cctt cgac cgas cgcc cgcg cggs cgsb cgss cgst ckac ckat ckbc ckck ckcs ckga cksa cksb ckst cktb ckts csaa csab csac csak csas csat cscb cscc cscs cska csks cssa csta cstc cstg csts ctab ctag ctba ctbs ctca ctsa ctsc ctss ctta ctts gaas gaba gabb gabs gabt gack gaga gagg gags gasa gasb gasc gask gass gast gata gatc gats gatt gbag gbas gbbs gc-c gcaa gcat gcbc gccc gccs gcss gcst gctc gcts ggbt gggg ggss gsab gsat gskb gtaa gtcs gtta kaaa kaab kaag kaak kaas kaat kaba kabb kabc kabg kacb kacc kacs kact kag- kaga kagb kagc kagg kags kagt kaka kakc kakk kaks kakt kas- kasa kasb kasc kask kass kast kat- kata katb katc katg katk kats katt kbaa kbab kbac kbak kbas kbat kbba kbbb kbbc kbbg kbbk kbbs kbbt kbca kbcb kbck kbcs kbct kbga kbgb kbgg kbgt kbkb kbkg kbkk kbsa kbsb kbsg kbsk kbss kbst kbta kbtb kbtc kbtk kbts kbtt kcaa kcab kcac kcas kcat kcba kcbc kcbk kcbs kcca kccb kccc kcck kcct kcgc kcgs kckc kckk kcsa kcsb kcsc kcsg kcss kcst kcta kctb kctc kgab kgac kgak kgas kgba kgbb kgbc kgbt kgcb kgcc kgga kggg kgks kgst kgtk kgts kkaa kkac kkag kkat kkba kkbb kkbg kkbs kkbt kkcb kkck kkcs kkct kkgb kkkk kksa kkss kkst kktc kktk kkts ksab ksac ksak ksas ksat ksba ksbc ksbs ksca kscb ksck kscs ksgc ksgg ksgt kska kskb kskg kskk ksks kssa ksss ksst ksta kstb kstc kstk ksts kstt ktaa ktag ktak ktas ktat ktba ktbb ktbc ktbg ktbt ktcc ktck ktcs ktga ktgg ktgs ktkb ktkc ktkk ktks ktkt ktsa ktsc ktst kttc kttg kttk ktts kttt sa-c saab saac saag saak saas saat saba sabb sabc sabs saca sacc sack sacs sact saga sagg sags sagt saka sakb sakk saks sasa sasc sask sass sast sata satb satc satg sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc sbtk scaa scab scac scag scak scas scat scba sccc sccs scct scgs sck- scsa scsc scst sctc scts sgaa sgac sgca sgcb sgcg sggg sggs sgss sgta sgts skab skac skag skat skss ssaa ssab ssac ssas ssat ssca sscc sscs ssgs ssgt sssa sssb sssc ssss ssta sstb sstc ssts stab stac stag stak stas stat stbc stbs stca stcc stcs stks stss sttc taa- taag taas taat taba tabb tabc tabs taca tacc tack tacs tact taga tagg tags taka takk taks takt tasa tasb tasc task tass tast tata tatb tats tatt tbas tbbs tbca tbcb tbcc tbgs tbst tbta tcbs tcca tccc tcga tctc tcts tgcc tgtc tgts tkac tkkg tkts tsaa tsat tsbc tsca tscc tscg tsgt tsks tssa tssg tsst tstc tsts ttab ttbb ttkg ttss tttt