a-a a-b a-c a-t aaa aab aac aan aar aas aat ab- aba abb abc abn abr abs abt ac- aca acb acc acn acr acs act an- ana anb anc ann anr ans ant ar- ara arb arc arn arr ars art as- asa asb asc asn asr ass ast at- ata atb atc atn atr ats att baa bab bac ban bar bas bat bba bbb bbc bbn bbr bbs bbt bca bcb bcc bcn bcr bcs bct bna bnb bnc bnn bnr bns bnt bra brb brn brr brs brt bsa bsb bsc bsn bsr bss bst bta btb btc btn btr bts btt c-- caa cab cac can car cas cat cba cbb cbc cbn cbr cbs cbt cca ccb ccc ccn ccr ccs cct cn- cna cnb cnc cnn cnr cns cnt cra crb crc crn crr crs crt csa csb csc csn csr css cst cta ctb ctc ctn ctr cts ctt naa nab nac nan nar nas nat nba nbb nbc nbn nbr nbs nbt nca ncb ncc ncn ncr ncs nct nna nnb nnc nnn nns nnt nra nrb nrc nrn nrr nrs nrt nsa nsb nsc nsn nsr nss nst nta ntb ntc ntn ntr nts ntt ra- raa rab rac ran rar ras rat rba rbb rbc rbn rbr rbs rbt rca rcb rcc rcn rcr rcs rct rna rnb rnc rnn rnr rns rnt rra rrb rrc rrn rrr rrs rrt rsa rsb rsc rsn rsr rss rst rta rtb rtc rtn rtr rts rtt saa sab sac san sar sas sat sba sbb sbc sbn sbr sbs sbt sca scb scc scn scr scs sct sna snb snc snn snr sns snt sr- sra srb src srn srr srs srt ss- ssa ssb ssc ssn ssr sss sst sta stb stc stn str sts stt taa tab tac tan tar tas tat tba tbb tbc tbn tbr tbs tbt tca tcb tcc tcn tcr tcs tct tna tnb tnc tnn tnr tns tnt tra trb trc trn trr trs trt tsa tsb tsc tsn tsr tss tst tta ttb ttc ttn ttr tts ttt

-ana aaaa aaab aaac aaan aaar aaas aaba aabb aabc aabt aaca aacb aacc aacn aacr aacs aact aana aara aarc aars aart aasa aasc aass aast aata aatc aatt abaa abab abac aban abar abas abat abb- abba abbb abbr abbs abbt abca abcb abcc abcn abcr abcs abct abra abrc abrs abs- absa abss abta abts ac-t acaa acab acac acan acar acas acat acba acca accc accs acct acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt ana- anaa anab anac anan anar anas anat anba anbb anca ancc anct anna annb anns annt anrc ansa ant- anta antr ants antt arab arac aran arar aras arat arba arbs arc- arca arcs arct arna arns arnt arr- arra arrc arrr arrs arrt ars- arsa arsc arst arta artc artr arts asaa asab asac asan asar asas asat asba asc- asca ascb ascc ascr asct asnc asra asrc asrs assa assc assn assr asss asst asta astb astc astr asts at-t ataa atab atac atan atar atas atat atbs atca atcc atcr atcs atna atns atra atrc atrn atsb atsc atst atta attn attr atts baaa baan baar baas baat baba babb babr babs bac- baca bacc bacn bacs bact bana banc bann banr bans bant bar- bara barb barc barn barr bars bart basa basc bass bast bata batc batn bats batt bbas bbbb bbbs bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcra bcrs bcsa bcsc bcsn bcss bctc bcts bnas bnrr bnss bnta brab brac bran bras brat brca brcb brna brns brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bsns bsra bssc bsts btaa btan btcc btcs btrc btrt btss bttb caaa caab caac caan caas caat caba cabs cac- caca cacc cacr cana canc cann cans cant cara carb carc carn carr cars cart casa casb casc casr cass cast cat- cata catb catc cats catt cbac cbar cbat cbbc cbbs cbca cbcc cbcn cbcr cbcs cbct cbna cbrn cbrt cbsa cbsc cbsn cbta cbtc ccaa ccab ccac ccar ccas ccat ccba ccbc ccbn ccca cccb cccc cccs ccna ccnb ccnc ccnr ccns ccra ccrc ccrs ccrt ccsa ccsn ccss ccst cctb cctc cctt cnaa cnac cnas cnbc cnna cnrc cnrr cnrt cnsa cnss cnta cntc cntr crab crac cran crar cras crat crbc crca crcc crcr crna crns crrt crsa crss crst crtc crts csaa csab csac csar csas csat cscb cscc cscr cscs csra csrc csrs cssa cssr csta cstc cstr csts ctab ctan ctba ctbs ctca ctns ctrc ctrn ctrs ctsa ctsc ctsn ctss ctta cttn ctts naaa naab naac naan naar naas naat naba nabc nabs naca nacc nacs nan- nana nanb nann nans nant nara narc narn narr nars nart nas- nasa nasb nasc nasr nass nast nata natc nats natt nbaa nbar nbas nbbc nbca nbcc nbcs ncaa ncac ncar ncat ncba ncbc ncbs ncca nccc nccn nccr nccs ncct ncna ncnc ncra ncrc ncsa ncsc ncss ncst ncta nctc nctr nnnn nnsa nnss nntn nrab nras nrca nrcs nrna nrrc nrsa nrsc nrta nrts nsaa nsac nsar nsca nscc nscs nsna nsnr nsra nsrc nssa nssb nssc nssr nsss nstc nsts ntbc ntcc ntrc ntsb ntsc ntss nttr raab raan raas raat raba rabb rabs rac- raca racc racs ract rana ranc rann rans rant rara rarb rars rasa rasc rass rast rata rats ratt rbbb rbbr rbbs rbss rbst rcac rcas rcbc rccb rccc rccs rcnr rcsa rcsc rcss rctc rcts rnas rnbr rncs rnnt rras rrat rrna rrrr rsaa rscc rscn rscs rsna rsnn rsnr rssa rsts rtan rtas rtca rtcc rtns rtss rtts sa-c saab saac saan saar saas saat saba sabb sabc sabr sabs saca sacc sacn sacr sacs sact sana sann sanr sans sant sara sarc sarn sarr sars sart sasa sasc sass sast sata satb