a-a a-b a-c a-t aaa aab aac aad aak aas aat ab- aba abb abc abd abk abs abt ac- aca acb acc acd ack acs act ad- ada adb adc add adk ads adt aka akb akc akd akk aks as- asa asb asc asd ask ass ast at- ata atb atc atd ats att baa bab bac bad bak bas bat bba bbb bbc bbd bbk bbs bbt bca bcb bcc bcd bck bcs bct bda bdb bdc bdd bdk bds bdt bka bkb bkc bkk bks bkt bsa bsb bsc bsd bsk bss bst bta btb btc btd btk bts btt c-- caa cab cac cad cak cas cat cba cbb cbc cbd cbk cbs cbt cca ccb ccc ccd cck ccs cct cda cdb cdc cdd cdk cds cdt cka ckb ckc ckd cks ckt csa csb csc csd csk css cst cta ctb ctc ctd ctk cts ctt daa dab dac dad dak das dat dba dbb dbc dbd dbk dbs dbt dca dcb dcc dcd dck dcs dct dda ddb ddc ddd ddk dds ddt dka dkb dkc dkk dks dkt dsa dsb dsc dsd dsk dss dst dta dtb dtc dtd dtk dts dtt k-t ka- kaa kab kac kad kak kas kat kba kbb kbc kbd kbk kbs kca kcb kcc kcd kck kcs kct kda kdb kdc kdk kds kdt kkb kkc kkk kks kkt ksa ksb ksc ksd ksk kss kst kta ktb ktc ktk kts ktt saa sab sac sad sak sas sat sba sbb sbc sbd sbk sbs sbt sca scb scc scd sck scs sct sda sdb sdc sdd sdk sds sdt sk- ska skb skc skd skk sks skt ss- ssa ssb ssc ssd ssk sss sst sta stb stc std stk sts stt taa tab tac tad tak tas tat tba tbb tbc tbd tbk tbs tbt tca tcb tcc tcd tck tcs tct tda tdb tdc tdd tdk tds tdt tka tkb tkc tkk tks tkt tsa tsb tsc tsd tsk tss tst tta ttb ttc ttd ttk tts ttt

a-ak aaaa aaab aaac aaad aaas aaba aabb aabc aabd aabt aaca aacb aacc aacd aack aacs aact aada aadc aads aadt aaka aasa aasc aasd aass aast aata aatc aatk aatt abaa abab abac abad abak abas abat abb- abba abbb abbs abbt abca abcb abcc abcd abcs abct abda abs- absa absd abss abta abts ac-t acaa acab acac acad acas acat acba acca accc accd accs acct acda acdb acdc acds acdt ackd acks acsa acsc acsd acss acst acta actc acts actt adaa adab adac adad adak adas adat adba adbc adcc adcs adda addc addd adds adsa adss adst adta adts akaa akas akca akka aksa akst asaa asab asac asad asak asas asat asba asc- asca ascb ascc asct asda asds aska asks askt assa assc assd assk asss asst asta astb astc asts at-t ataa atab atac atad atak atas atat atbs atca atcc atck atcs atdt atka atkt atsb atsc atst atta atts baaa baad baak baas baat baba babb babs bac- baca bacc back bacs bact bada badb badd bads bak- baka baks bakt basa basc bask bass bast bata batc bats batt bbad bbas bbbb bbbs bbdd bcaa bcas bcat bcbc bcbs bcca bccc bccs bcda bcds bcsa bcsc bcss bctc bcts bdbc bddc bdsd bsaa bsac bsas bsat bsbd bscs bskt bssc bssd bsts btaa btcc btcs btdt btss bttb c-cd caaa caab caac caas caat caba cabs cac- caca cacc cack cada cadc cadd cads caka casa casb casc casd cask cass cast cat- cata catb catc catd cats catt cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbdb cbdc cbds cbka cbsa cbsc cbta cbtc ccaa ccab ccac ccad ccas ccat ccba ccbc ccca cccb cccc cccs ccdc ccds ccsa ccsd ccss ccst cctb cctc cctt cdaa cdac cdad cdba cdcs cdda cddb cdss ckac ckat ckbc ckck ckcs cksa cksb ckst cktb ckts csaa csab csac csak csas csat cscb cscc cscd cscs csda csdb cska csks cssa cssd csta cstc cstd csts ctab ctba ctbs ctca ctsa ctsc ctss ctta ctts daab daad daas daba dabb dabs dabt daca dacs dact dada dads daka daks dasa dasb dasc dasd dask dass dast data dats datt dbas dbcc dbcs dbsa dbss dbtt dcas dcbc dcca dccb dccc dccs dcct dcdb dcds dcsc dcss dctc dcts dddd ddss ddts dkba dkdc dsac dsba dsbc dscc dscs dsda dssa dssc dsst dstc dsts dtaa dtac dtcc dtss kaaa kaab kaak kaas kaat kaba kabb kabc kabd kacb kacc kacd kacs kact kad- kada kadd kads kadt kaka kakc kakk kaks kakt kas- kasa kasb kasc kask kass kast kat- kata katb katc katd katk kats katt kbaa kbab kbac kbad kbak kbas kbat kbba kbbb kbbc kbbd kbbk kbbs kbbt kbca kbcb kbck kbcs kbct kbdb kbds kbkb kbkk kbsa kbsb kbsk kbss kbst kbta kbtb kbtc kbtk kbts kbtt kcaa kcab kcac kcad kcas kcat kcba kcbc kcbd kcbk kcbs kcca kccb kccc kccd kcck kcct kcda kcdc kcdd kcds kckc kckk kcsa kcsb kcsc kcsd kcss kcst kcta kctb kctc kdaa kdab kdac kdad kdak kdat kdbb kdbs kdca kdcc kdcd kddb kddc kddd kddk kdka kdkb kdkd kdkk kdkt kdsc kdsd kdsk kdss kdst kdta kdtd kkaa kkac kkat kkba kkbb kkbd kkbs kkbt kkcb kkcd kkck kkcs kkct kkda kkdc kkdd kkdt kkkk kksa kksd kkss kkst kktc kktk kkts ksab ksac ksak ksas ksat ksba ksbc ksbs ksca kscb ksck kscs ksdc ksdk ksds kska kskb kskd kskk ksks kssa ksss ksst ksta kstb kstc kstk ksts kstt ktaa ktak ktas ktat ktba ktbb ktbc ktbt ktcc ktck ktcs ktdb ktdc ktdd ktdk ktkb ktkc ktkk ktks ktkt ktsa ktsc ktsd ktst kttc kttk ktts kttt sa-c saab saac saad saak saas saat saba sabb sabc sabs saca sacc sacd sack sacs sact sada sadb sadc sadd sads sadt saka sakb sakk saks sasa sasc sasd sask