aaaa aaab aaac aaal aaas aaba aabb aabc aabl aaca aacb aacc aacl aacs aacu aala aalc aall aals aalu aasa aasc aass aasu aaus abaa abab abac abal abas abau abb- abba abbb abbs abca abcb abcc abcl abcs abla abls abs- absa absl abss absu abua abul abus acaa acab acac acas acba acbl acca accc accs accu acla aclc acls aclu acsa acsc acsl acss acu- acul acus alaa alac alal alas alau alb- alba albc albs albu alca alcc alcs all- alla alll alls allu alsa alsc alua alus asaa asab asac asal asas asau asba asbu asc- asca ascb ascc ascl asla assa assc assl asss assu asub asus auaa auca aul- aula aull auls aulu ausa ausu baaa baal baas baba babb babs babu bac- baca bacc bacs bala balc ball bals balu basa basc bass basu bau- baul bbas bbau bbbb bbbs bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcsa bcsc bcsl bcss bcuc blaa blab blac blas blau blcu blls blss blub blus bsaa bsac bsas bscs bslc bssc bual buba bubb bubs bubu buca bucc bucs bucu bula bulb bull buls bulu busa busc buss busu buus caaa caab caac caal caas caba cabs cabu cac- caca cacc cala calc call cals calu casa casb casc casl cass casu cauc caul caus cbac cbal cbbc cbbs cbca cbcc cbcl cbcs cbcu cblb cblc cbsa cbsc cbus ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccl cccs cccu ccla cclc ccls ccsa ccsl ccss ccuc ccus clab clas clau clsa clsc club csaa csab csac csas cscb cscc cscl cscs csla cslu cssa csua csus cuau cub- cuba cubb cubs cuca cucc cula culb culc cull culs cusa cusb cuss cusu laaa laac laal laas laba labs labu laca lacc lacl lacs lacu lala lall lalu lasa lass lasu laub laul laus lbcc lbsc lcac lcbc lcca lccc lccs lcls lcsc llbs llcc llcs lllc llll lsbu lscb lscs lsla lssa luas luau luba lubs luca lucs lula lull lulu lusa luss luua sa-c saab saac saal saas saba sabb sabc sabs sabu saca sacc sacs sacu sala salc sall sals salu sasa sasc sasl sass saua sauc saul saus sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbus scaa scab scac scal scas scba sccc sccl sccs scl- sclc scls scsa scsc scsl scsu scua scub scul slaa slab slac slas slau slcc slcu slsa slsc slsu slub sluc ssaa ssab ssac ssas ssau ssca sscc sscs ssla sslc sssa sssb sssc ssss suas sub- suba subb subl subs suc- succ sucs sul- sula sulc sull sulu sus- susa suss susu suus uabc uaca uasa uaua ubac ubal ubba ubla ubls ucal ucas ucbc ucca ucla ucsa ucsb ucsc ucsu ucua ulaa ulas ulbc ulcc ulla ulsa ulua ulul ulus us-a usaa usac usal usas usba usbc usbl usbs usca uscc uscs uslu ussa ussb ussc usss ussu usua usul usus uulu uuuu