-ana aaaa aaab aaac aaad aaan aaas aaba aabb aabc aabd aabt aaca aacb aacc aacd aacn aacs aact aada aadc aads aadt aana aand aasa aasc aasd aass aast aata aatc aatt abaa abab abac abad aban abas abat abb- abba abbb abbs abbt abca abcb abcc abcd abcn abcs abct abda abs- absa absd abss abta abts ac-t acaa acab acac acad acan acas acat acba acca accc accd accs acct acda acdb acdc acds acdt acsa acsc acsd acss acst acta actc acts actt adaa adab adac adad adan adas adat adba adbc adcc adcs adda addc addd addn adds adna adns adsa adss adst adta adts ana- anaa anab anac anad anan anas anat anba anbb anca ancc anct and- anda ands andt anna annb anns annt ansa ansd ant- anta ants antt asaa asab asac asad asan asas asat asba asc- asca ascb ascc asct asda asds asnc assa assc assd assn asss asst asta astb astc asts at-t ataa atab atac atad atan atas atat atbs atca atcc atcs atdt atna atns atsb atsc atst atta attn atts baaa baad baan baas baat baba babb babs bac- baca bacc bacn bacs bact bada badb badd bads bana banc band bann bans bant basa basc bass bast bata batc batn bats batt bbad bbas bbbb bbbs bbdd bcaa bcas bcat bcbc bcbs bcca bccc bccs bcda bcds bcsa bcsc bcsn bcss bctc bcts bdbc bddc bdna bdsd bnas bnss bnta bsaa bsac bsas bsat bsbd bscs bsnd bsns bssc bssd bsts btaa btan btcc btcs btdt btss bttb c-cd caaa caab caac caan caas caat caba cabs cac- caca cacc cada cadc cadd cads cana canc cand cann cans cant casa casb casc casd cass cast cat- cata catb catc catd cats catt cbac cbat cbbc cbbs cbca cbcc cbcn cbcs cbct cbdb cbdc cbdn cbds cbna cbnd cbsa cbsc cbsn cbta cbtc ccaa ccab ccac ccad ccas ccat ccba ccbc ccbn ccca cccb cccc cccs ccdc ccdn ccds ccna ccnb ccnc ccns ccsa ccsd ccsn ccss ccst cctb cctc cctt cdaa cdac cdad cdba cdcs cdda cddb cdna cdnb cdnc cdss cnaa cnac cnas cnbc cnda cndd cnna cnsa cnss cnta cntc csaa csab csac csas csat cscb cscc cscd cscs csda csdb csdn cssa cssd csta cstc cstd csts ctab ctan ctba ctbs ctca ctns ctsa ctsc ctsn ctss ctta cttn ctts d-na daab daad daan daas daba dabb dabs dabt daca dacs dact dada dads dana dand dann dans dant dasa dasb dasc dasd dass dast data dats datt dbas dbcc dbcs dbsa dbss dbtt dcas dcbc dcca dccb dccc dccs dcct dcdb dcds dcns dcsc dcss dctc dcts dddd ddss ddts dnaa dnab dnac dnad dnan dnas dnat dncs dnsa dnsc dntt dsac dsba dsbc dscc dscn dscs dsda dssa dssc dssn dsst dstc dstn dsts dtaa dtac dtcc dtna dtnb dtss naaa naab naac naad naan naas naat naba nabc nabs naca nacc nacd nacs nada nadc nads nan- nana nanb nand nann nans nant nas- nasa nasb nasc nasd nass nast nata natc nats natt nbaa nbad nbas nbbc nbca nbcc nbcs ncaa ncac ncat ncba ncbc ncbs ncca nccc nccn nccs ncct ncda ncdc ncdn ncds ncna ncnc ncnd ncsa ncsc ncss ncst ncta nctc ndaa ndas ndcc ndcs nddb ndna ndnt ndss ndtc nndb nnnn nnsa nnss nntn nsaa nsac nsca nscc nscd nscs nsds nsdt nsna nssa nssb nssc nsss nstc nstd nsts ntbc ntcc ntds ntnd ntsb ntsc ntss sa-c saab saac saad saan saas saat saba sabb sabc sabs saca sacc sacd sacn sacs sact sada sadb sadc sadd sads sadt sana sand sann sans sant sasa sasc sasd sass sast sata satb satc satd satn sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbds sbsa sbsd sbst sbtc sbtn scaa scab scac scad scan scas scat scba sccc sccs scct scda scdc scds scna scnd scnt scsa scsc scsd scsn scst sctc sctd sctn scts sdba sdcc sddc sdds sdna sdsc sdss snab snad snas snat snba snca sncc snda snns snsd ssaa ssab ssac ssan ssas ssat ssbn ssca sscc sscs ssdc ssdd ssns sssa sssb sssc ssss ssta sstb sstc sstd ssts stab stac stad stan stas stat stbc stbd stbs stca stcc stcs stds stnd stnn stns stss sttc sttd taa- taan taas taat taba tabb tabc tabs taca tacc tacs tact tada tads tana tand tann tans tant tasa tasb tasc tass tast tata tatb tats tatt tbas tbbs tbca tbcb tbcc tbcd tbst tbta tcad tcbs tcca tccc tcdd tcnn tctc tcts tdac tddb tdna tdss tnbc tnca tncc tndd tnts tsaa tsat tsbc tsbd tsca tscc tsdb tsna tssa tsst tstc tsts ttab ttbb ttcn ttss tttt