a-wa aaaa aaab aaac aaas aaba aabb aabc aabt aabw aaca aacb aacc aacs aact aasa aasc aass aast aata aatc aatt aatw aawt aaww abaa abab abac abas abat abaw abb- abba abbb abbs abbt abca abcb abcc abcs abct abcw abs- absa abss absw abta abts abwa ac-t acaa acab acac acas acat acba acca accc accs acct acsa acsc acss acst acsw acta actc acts actt acwa acww asaa asab asac asas asat asba asc- asca ascb ascc asct ascw assa assc asss asst asta astb astc asts at-t ataa atab atac atas atat atbs atca atcc atcs atsb atsc atst atta atts atwa atws atwt awac awas awss awst awts awwa awws baaa baas baat baba babb babs bac- baca bacc bacs bact basa basc bass bast bata batc bats batt baw- baws bbas bbbb bbbs bbwc bbws bcaa bcas bcat bcbc bcbs bcca bccc bccs bcsa bcsc bcss bctc bcts bsaa bsac bsas bsat bsaw bscs bssc bsts btaa btcc btcs btss bttb btwc bwaa caaa caab caac caas caat caba cabs cac- caca cacc cacw casa casb casc cass cast cat- cata catb catc cats catt catw caws cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbsa cbsc cbta cbtc cbwa ccaa ccab ccac ccas ccat ccba ccbc ccca cccb cccc cccs ccsa ccss ccst cctb cctc cctt csaa csab csac csas csat cscb cscc cscs cssa csta cstc csts csws ctab ctba ctbs ctca ctsa ctsc ctss ctta ctts cttw cwac cwts sa-c saab saac saas saat saba sabb sabc sabs saca sacc sacs sact sasa sasc sass sast sata satb satc sats satt sawa saws sawt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc scaa scab scac scas scat scaw scba sccc sccs scct scsa scsc scst sctc scts ssaa ssab ssac ssas ssat ssaw ssca sscc sscs sssa sssb sssc ssss ssta sstb sstc ssts ssws stab stac stas stat staw stbc stbs stca stcc stcs stss sttc swab swac swas swat swbc swbs swbw swcc swss swts taa- taas taat taba tabb tabc tabs taca tacc tacs tact tasa tasb tasc tass tast tata tatb tats tatt tawa taws tawt taww tbas tbbs tbca tbcb tbcc tbst tbta tcbs tcca tccc tctc tcts tsaa tsat tsbc tsca tscc tssa tsst tstc tsts tswa ttab ttbb ttss tttt twas twat twbt twss waaa waac waas waat waaw waba wabb wabc wabs wabt wabw waca wacb wacc wacs wact wasa wasb wasc wass wast wata watb watc wats watt watw wawa wawb wawc waws wawt wbaa wbab wbac wbat wbbb wbbs wbbt wbbw wbca wbcb wbct wbcw wbsa wbsb wbsc wbss wbst wbsw wbta wbtc wbts wbtt wbtw wbwb wbwc wbwt wcab wcas wcat wcba wcbc wcbs wcbt wcbw wcca wccb wccc wccs wcct wccw wcsa wcsb wcsc wcss wcst wcsw wcta wctb wctc wcts wctt wctw wcwa wcwb wcwc wsaa wsat wsba wsbb wsbc wsbs wsbt wsbw wscb wscc wscs wscw wssc wsss wsst wssw wsta wstb wstc wsts wstt wstw wswb wsws wswt wsww wtab wtac wtaw wtbb wtbc wtbs wtca wtcb wtcc wtcs wtct wtcw wtsa wtsb wtss wtta wttb wttc wtts wttt wttw wtwa wtwb wtws wtwt wtww wwab wwac wwba wwbb wwbc wwbt wwca wwcb wwcs wwct wwcw wwsb wwsc wwss wwst wwta wwtc wwtw wwwa wwwc wwws wwww