a-ak a-wa aaaa aaab aaac aaas aaba aabb aabc aabw aaca aacb aacc aack aacs aaka aasa aasc aass aaww abaa abab abac abak abas abaw abb- abba abbb abbs abca abcb abcc abcs abcw abs- absa abss absw abwa acaa acab acac acas acba acca accc accs acks ackw acsa acsc acss acsw acwa acww akaa akas akca akka aksa akwa asaa asab asac asak asas asba asc- asca ascb ascc ascw aska asks assa assc assk asss awac awas awka awsk awss awwa awws baaa baak baas baba babb babs bac- baca bacc back bacs bak- baka baks basa basc bask bass baw- bawk baws bbas bbbb bbbs bbwc bbws bcaa bcas bcbc bcbs bcca bccc bccs bcsa bcsc bcss bsaa bsac bsas bsaw bscs bssc bwaa caaa caab caac caas caba cabs cac- caca cacc cack cacw caka casa casb casc cask cass cawk caws cbac cbbc cbbs cbca cbcc cbcs cbka cbsa cbsc cbwa ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccs cckw ccsa ccss ckac ckbc ckck ckcs ckcw cksa cksb cksw ckws ckww csaa csab csac csak csas cscb cscc cscs cska csks cssa cswk csws cwac kaaa kaab kaak kaas kaba kabb kabc kabw kacb kacc kacs kacw kaka kakc kakk kaks kas- kasa kasb kasc kask kass kasw kaw- kawa kawc kawk kaws kaww kbaa kbab kbac kbak kbas kbba kbbb kbbc kbbk kbbs kbbw kbca kbcb kbck kbcs kbcw kbkb kbkk kbkw kbsa kbsb kbsk kbss kbsw kbwa kbwb kbwc kbww kcaa kcab kcac kcas kcaw kcba kcbc kcbk kcbs kcbw kcca kccb kccc kcck kckc kckk kcsa kcsb kcsc kcss kcwa kcwb kcwc kcwk kkaa kkac kkaw kkba kkbb kkbs kkcb kkck kkcs kkcw kkkk kksa kkss kksw kkwb kkwk kkws ksab ksac ksak ksas ksaw ksba ksbc ksbs ksbw ksca kscb ksck kscs kska kskb kskk ksks kssa ksss kswa kswb kswc ksws ksww kwab kwac kwak kwaw kwbc kwbw kwca kwck kwka kwkb kwkc kwkk kwkw kwsa kwsc kwsk kwss kwsw kwwk kwws sa-c saab saac saak saas saba sabb sabc sabs saca sacc sack sacs saka sakb sakk saks sasa sasc sask sass sawa saws sbaa sbac sbas sbbs sbca sbcc sbcs sbsa scaa scab scac scak scas scaw scba sccc sccs sck- scsa scsc skab skac skaw skss skws ssaa ssab ssac ssas ssaw ssca sscc sscs sssa sssb sssc ssss ssws swab swac swak swas swbc swbs swbw swcc swss waaa waac waas waaw waba wabb wabc wabk wabs wabw waca wacb wacc wack wacs waka wakb wakk waks wakw wasa wasb wasc wask wass wawa wawb wawc wawk waws wbaa wbab wbac wbak wbbb wbbk wbbs wbbw wbca wbcb wbck wbcw wbka wbkb wbkk wbks wbkw wbsa wbsb wbsc wbss wbsw wbwb wbwc wcab wcas wcba wcbc wcbs wcbw wcca wccb wccc wcck wccs wccw wcka wckb wckk wcks wckw wcsa wcsb wcsc wcsk wcss wcsw wcwa wcwb wcwc wkaa wkac wkak wkba wkbc wkbk wkbw wkca wkcb wkcs wkcw wkkb wkkc wkks wkkw wksb wksc wksk wkss wksw wkwc wkws wsaa wsak wsba wsbb wsbc wsbk wsbs wsbw wscb wscc wscs wscw wskb wskk wskw wssc wsss wssw wswb wsws wsww wwab wwac wwba wwbb wwbc wwca wwcb wwck wwcs wwcw wwka wwkb wwkc wwks wwsb wwsc wwsk wwss wwwa wwwc wwwk wwws wwww