a-a a-b a-c a-t aaa aab aac aad aan aas aat ab- aba abb abc abd abn abs abt ac- aca acb acc acd acn acs act ad- ada adb adc add adn ads adt an- ana anb anc and ann ans ant as- asa asb asc asd asn ass ast at- ata atb atc atd atn ats att baa bab bac bad ban bas bat bba bbb bbc bbd bbn bbs bbt bca bcb bcc bcd bcn bcs bct bda bdb bdc bdd bds bdt bna bnb bnc bnd bnn bns bnt bsa bsb bsc bsd bsn bss bst bta btb btc btd btn bts btt c-- caa cab cac cad can cas cat cba cbb cbc cbd cbn cbs cbt cca ccb ccc ccd ccn ccs cct cda cdb cdc cdd cdn cds cdt cn- cna cnb cnc cnd cnn cns cnt csa csb csc csd csn css cst cta ctb ctc ctd ctn cts ctt daa dab dac dad dan das dat dba dbb dbc dbd dbn dbs dbt dca dcb dcc dcd dcn dcs dct dda ddb ddc ddd ddn dds ddt dna dnb dnc dnd dnn dns dnt dsa dsb dsc dsd dsn dss dst dta dtb dtc dtd dtn dts dtt naa nab nac nad nan nas nat nba nbb nbc nbd nbn nbs nbt nca ncb ncc ncd ncn ncs nct nda ndb ndc ndd ndn nds ndt nna nnb nnc nnn nns nnt nsa nsb nsc nsd nsn nss nst nta ntb ntc ntd ntn nts ntt saa sab sac sad san sas sat sba sbb sbc sbd sbn sbs sbt sca scb scc scd scn scs sct sda sdb sdc sdd sdn sds sdt sna snb snc snd snn sns snt ss- ssa ssb ssc ssd ssn sss sst sta stb stc std stn sts stt taa tab tac tad tan tas tat tba tbb tbc tbd tbn tbs tbt tca tcb tcc tcd tcn tcs tct tda tdb tdc tdd tdn tds tdt tna tnb tnc tnd tnn tns tnt tsa tsb tsc tsd tsn tss tst tta ttb ttc ttd ttn tts ttt

-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