aaaa aaab aaac aaas aaba aabb aabc aaca aacb aacc aacs aasa aasc aass abaa abab abac abag abas abb- abba abbb abbs abca abcb abcc abcs abs- absa abss acaa acab acac acag acas acba acca accc accs acga acgs acsa acsc acss agac agag agas agba agca agcc agga agsa agsg asaa asab asac asag asas asba asc- asca ascb ascc assa assc asss baaa baas baba babb babs bac- baca bacc bacs baga bagg bags basa basc bass bbas bbbb bbbs bbga bcaa bcas bcbc bcbg bcbs bcca bccc bccs bcgs bcsa bcsc bcss bgca bggs bsaa bsac bsas bscs bsgs bssc caaa caab caac caas caba cabg cabs cac- caca cacc caga cagg cags casa casb casc cass cbac cbbc cbbs cbca cbcc cbcs cbga cbgb cbsa cbsc ccaa ccab ccac ccag ccas ccba ccbc ccca cccb cccc cccs ccga ccgc ccgs ccsa ccsg ccss cgac cgas cgcc cgcg cggs cgsb cgss csaa csab csac csas cscb cscc cscs cssa gaas gaba gabb gabs gaga gagg gags gasa gasb gasc gass gbag gbas gbbs gc-c gcaa gcbc gccc gccs gcss gggg ggss gsab sa-c saab saac saag saas saba sabb sabc sabs saca sacc sacs saga sagg sags sasa sasc sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa scaa scab scac scag scas scba sccc sccs scgs scsa scsc sgaa sgac sgca sgcb sgcg sggg sggs sgss ssaa ssab ssac ssas ssca sscc sscs ssgs sssa sssb sssc ssss