-ana aaaa aaab aaac aaan aaas aaba aabb aabc aabt aaca aacb aacc aacn aacs aact aana aasa aasc aass aast aata aatc aatt abaa abab abac aban abas abat abb- abba abbb abbs abbt abca abcb abcc abcn abcs abct abs- absa abss abta abts ac-t acaa acab acac acan acas acat acba acca accc accs acct acsa acsc acss acst acta actc acts actt ana- anaa anab anac anan anas anat anba anbb anca ancc anct anna annb anns annt ansa ant- anta ants antt asaa asab asac asan asas asat asba asc- asca ascb ascc asct asnc assa assc assn asss asst asta astb astc asts at-t ataa atab atac atan atas atat atbs atca atcc atcs atna atns atsb atsc atst atta attn atts baaa baan baas baat baba babb babs bac- baca bacc bacn bacs bact bana banc bann bans bant basa basc bass bast bata batc batn bats batt bbas bbbb bbbs bcaa bcas bcat bcbc bcbs bcca bccc bccs bcsa bcsc bcsn bcss bctc bcts bnas bnss bnta bsaa bsac bsas bsat bscs bsns bssc bsts btaa btan btcc btcs btss bttb caaa caab caac caan caas caat caba cabs cac- caca cacc cana canc cann cans cant casa casb casc cass cast cat- cata catb catc cats catt cbac cbat cbbc cbbs cbca cbcc cbcn cbcs cbct cbna cbsa cbsc cbsn cbta cbtc ccaa ccab ccac ccas ccat ccba ccbc ccbn ccca cccb cccc cccs ccna ccnb ccnc ccns ccsa ccsn ccss ccst cctb cctc cctt cnaa cnac cnas cnbc cnna cnsa cnss cnta cntc csaa csab csac csas csat cscb cscc cscs cssa csta cstc csts ctab ctan ctba ctbs ctca ctns ctsa ctsc ctsn ctss ctta cttn ctts naaa naab naac naan naas naat naba nabc nabs naca nacc nacs nan- nana nanb nann nans nant nas- nasa nasb nasc nass nast nata natc nats natt nbaa nbas nbbc nbca nbcc nbcs ncaa ncac ncat ncba ncbc ncbs ncca nccc nccn nccs ncct ncna ncnc ncsa ncsc ncss ncst ncta nctc nnnn nnsa nnss nntn nsaa nsac nsca nscc nscs nsna nssa nssb nssc nsss nstc nsts ntbc ntcc ntsb ntsc ntss sa-c saab saac saan saas saat saba sabb sabc sabs saca sacc sacn sacs sact sana sann sans sant sasa sasc sass sast sata satb satc satn sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc sbtn scaa scab scac scan scas scat scba sccc sccs scct scna scnt scsa scsc scsn scst sctc sctn scts snab snas snat snba snca sncc snns ssaa ssab ssac ssan ssas ssat ssbn ssca sscc sscs ssns sssa sssb sssc ssss ssta sstb sstc ssts stab stac stan stas stat stbc stbs stca stcc stcs stnn stns stss sttc taa- taan taas taat taba tabb tabc tabs taca tacc tacs tact tana tann tans tant tasa tasb tasc tass tast tata tatb tats tatt tbas tbbs tbca tbcb tbcc tbst tbta tcbs tcca tccc tcnn tctc tcts tnbc tnca tncc tnts tsaa tsat tsbc tsca tscc tsna tssa tsst tstc tsts ttab ttbb ttcn ttss tttt