a-a a-b a-c a-t aaa aab aac aar aas aat aau ab- aba abb abc abr abs abt abu ac- aca acb acc acr acs act acu ar- ara arb arc arr ars art aru as- asa asb asc asr ass ast asu at- ata atb atc atr ats att atu au- aua aub auc aur aus aut b-u baa bab bac bar bas bat bau bba bbb bbc bbr bbs bbt bbu bca bcb bcc bcr bcs bct bcu bra brb brr brs brt bru bsa bsb bsc bsr bss bst bsu bta btb btc btr bts btt btu bua bub buc bur bus but buu c-- caa cab cac car cas cat cau cba cbb cbc cbr cbs cbt cbu cca ccb ccc ccr ccs cct ccu cra crb crc crr crs crt cru csa csb csc csr css cst csu cta ctb ctc ctr cts ctt ctu cua cub cuc cur cus cut cuu ra- raa rab rac rar ras rat rau rba rbb rbc rbr rbs rbt rbu rca rcb rcc rcr rcs rct rcu rra rrb rrc rrr rrs rrt rru rsa rsb rsc rsr rss rst rsu rta rtb rtc rtr rts rtt rtu rua rub ruc rur rus rut ruu saa sab sac sar sas sat sau sba sbb sbc sbr sbs sbt sbu sca scb scc scr scs sct scu sr- sra srb src srr srs srt ss- ssa ssb ssc ssr sss sst ssu sta stb stc str sts stt stu sua sub suc sur sus sut suu taa tab tac tar tas tat tau tba tbb tbc tbr tbs tbt tbu tca tcb tcc tcr tcs tct tcu tra trb trc trr trs trt tru tsa tsb tsc tsr tss tst tsu tta ttb ttc ttr tts ttt ttu tua tub tuc tur tus tut tuu ua- uaa uab uac uar uas uat uau uba ubb ubc ubr ubs ubt ubu uca ucb ucc ucr ucs uct ucu ur- ura urb urc urr urs urt uru usa usb usc usr uss ust usu uta utb utc utr uts utt utu uua uuc uur uus uut uuu

aaaa aaab aaac aaar aaas aaba aabb aabc aabt aaca aacb aacc aacr aacs aact aacu aara aarc aars aart aaru aasa aasc aass aast aasu aata aatc aatt aaus abaa abab abac abar abas abat abau abb- abba abbb abbr abbs abbt abca abcb abcc abcr abcs abct abra abrc abrs abs- absa abss absu abta abts abtu abua abus abut ac-t acaa acab acac acar acas acat acba acca accc accs acct accu acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt actu acu- acur acus acut arab arac arar aras arat arau arba arbs arc- arca arcs arct arr- arra arrc arrr arrs arrt arru ars- arsa arsc arst arsu arta artc artr arts arua arub arut asaa asab asac asar asas asat asau asba asbu asc- asca ascb ascc ascr asct asra asrc asrs asru assa assc assr asss asst assu asta astb astc astr asts asub asur asus at-t ataa atab atac atar atas atat atbs atca atcc atcr atcs atra atrc atru atsb atsc atst atta attr atts attu atua atub atuc atur atus auaa auca auct aur- aura ausa aust ausu aut- auts baaa baar baas baat baba babb babr babs babu bac- baca bacc bacs bact bar- bara barb barc barr bars bart baru basa basc bass bast basu bata batc bats batt batu bau- baur bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcra bcrs bcru bcsa bcsc bcss bctc bcts bcuc brab brac bras brat brau brca brcb brrr brrs brsb brsr brst brtc bruc brus brut bsaa bsac bsas bsat bscs bsra bssc bsts btaa btcc btcs btrc btrt btss bttb btus buar buat buba bubb bubs bubu buca bucc bucs bucu bur- bura burb burr burs burt buru busa busc buss bust busu but- buta buts butt buus caaa caab caac caas caat caba cabs cabu cac- caca cacc cacr cara carb carc carr cars cart casa casb casc casr cass cast casu cat- cata catb catc cats catt catu cauc caus caut cbac cbar cbat cbbc cbbs cbca cbcc cbcr cbcs cbct cbcu cbrt cbsa cbsc cbta cbtc cbus ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccs cccu ccra ccrc ccrs ccrt ccsa ccss ccst cctb cctc cctt ccuc ccus ccut crab crac crar cras crat crau crbc crbu crca crcc crcr crrt crsa crss crst crtc crts crub crus crut csaa csab csac csar csas csat cscb cscc cscr cscs csra csrc csrs cssa cssr csta cstc cstr csts csua csur csus ctab ctba ctbs ctca ctrc ctrs ctsa ctsc ctss ctsu ctta ctts cuau cub- cuba cubb cubs cuca cucc cura curb curr curs curt cusa cusb cuss cust cusu cut- cuta cutc cuts cutt raab raas raat raba rabb rabs rabu rac- raca racc racs ract racu rara rarb rars rasa rasc rass rast rasu rata rats ratt ratu raua raub rauc raus raut rbbb rbbr rbbs rbss rbst rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rctc rcts rras rrat rrrr rsaa rscc rscs rssa rsts rstu rsua rtas rtca rtcc rtss rtts ruas ruba rubb rubs rubu ruca ruct rura rurc rurs ruru rusa russ rust rusu ruta ruts rutt rutu sa-c saab saac saar saas saat saba sabb sabc sabr sabs sabu saca sacc sacr sacs sact sacu sara sarc sarr sars sart saru sasa sasc sass sast sata satb satc satr sats satt satu saua sauc saur saus saut sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc sbus scaa scab scac scar scas scat scba sccc sccs scct scr- scra scrc scrs scsa scsc scsr scst scsu sctc sctr scts scua scub scur scut sras srbc srcc srct srta srtr srub ssaa ssab ssac ssas ssat ssau ssbr ssca sscc sscs ssra ssrc ssrs sssa