a-a a-b a-c a-t aaa aab aac aar aas aat ab- aba abb abc abr abs abt ac- aca acb acc acr acs act ar- ara arb arc arr ars art as- asa asb asc asr ass ast at- ata atb atc atr ats att baa bab bac bar bas bat bba bbb bbc bbr bbs bbt bca bcb bcc bcr bcs bct bra brb brr brs brt bsa bsb bsc bsr bss bst bta btb btc btr bts btt c-- caa cab cac car cas cat cba cbb cbc cbr cbs cbt cca ccb ccc ccr ccs cct cra crb crc crr crs crt csa csb csc csr css cst cta ctb ctc ctr cts ctt ra- raa rab rac rar ras rat rba rbb rbc rbr rbs rbt rca rcb rcc rcr rcs rct rra rrb rrc rrr rrs rrt rsa rsb rsc rsr rss rst rta rtb rtc rtr rts rtt saa sab sac sar sas sat sba sbb sbc sbr sbs sbt sca scb scc scr scs sct sr- sra srb src srr srs srt ss- ssa ssb ssc ssr sss sst sta stb stc str sts stt taa tab tac tar tas tat tba tbb tbc tbr tbs tbt tca tcb tcc tcr tcs tct tra trb trc trr trs trt tsa tsb tsc tsr tss tst tta ttb ttc ttr tts ttt

aaaa aaab aaac aaar aaas aaba aabb aabc aabt aaca aacb aacc aacr aacs aact aara aarc aars aart aasa aasc aass aast aata aatc aatt abaa abab abac abar abas abat abb- abba abbb abbr abbs abbt abca abcb abcc abcr abcs abct abra abrc abrs abs- absa abss abta abts ac-t acaa acab acac acar acas acat acba acca accc accs acct acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt arab arac arar aras arat arba arbs arc- arca arcs arct arr- arra arrc arrr arrs arrt ars- arsa arsc arst arta artc artr arts asaa asab asac asar asas asat asba asc- asca ascb ascc ascr asct asra asrc asrs assa assc assr asss asst asta astb astc astr asts at-t ataa atab atac atar atas atat atbs atca atcc atcr atcs atra atrc atsb atsc atst atta attr atts baaa baar baas baat baba babb babr babs bac- baca bacc bacs bact bar- bara barb barc barr bars bart basa basc bass bast bata batc bats batt bbas bbbb bbbs bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcra bcrs bcsa bcsc bcss bctc bcts brab brac bras brat brca brcb brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bsra bssc bsts btaa btcc btcs btrc btrt btss bttb caaa caab caac caas caat caba cabs cac- caca cacc cacr cara carb carc carr cars cart casa casb casc casr cass cast cat- cata catb catc cats catt cbac cbar cbat cbbc cbbs cbca cbcc cbcr cbcs cbct cbrt cbsa cbsc cbta cbtc ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccs ccra ccrc ccrs ccrt ccsa ccss ccst cctb cctc cctt crab crac crar cras crat crbc crca crcc crcr 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 ctba ctbs ctca ctrc ctrs ctsa ctsc ctss ctta ctts raab raas raat raba rabb rabs rac- raca racc racs ract rara rarb rars rasa rasc rass rast rata rats ratt rbbb rbbr rbbs rbss rbst rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rctc rcts rras rrat rrrr rsaa rscc rscs rssa rsts rtas rtca rtcc rtss rtts sa-c saab saac saar saas saat saba sabb sabc sabr sabs saca sacc sacr sacs sact sara sarc sarr sars sart sasa sasc sass sast sata satb satc satr sats satt sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc scaa scab scac scar scas scat scba sccc sccs scct scr- scra scrc scrs scsa scsc scsr scst sctc sctr scts sras srbc srcc srct srta srtr ssaa ssab ssac ssas ssat ssbr ssca sscc sscs ssra ssrc ssrs sssa sssb sssc ssss ssta sstb sstc ssts stab stac star stas stat stbc stbs stca stcc stcs stra strc strs stss sttc sttr taa- taar taas taat taba tabb tabc tabs taca tacc tacs tact tara tarb tarc tarr tars tart tasa tasb tasc tasr tass tast tata tatb tatr tats tatt tbar tbas tbbs tbca tbcb tbcc tbrb tbst tbta tcbs tcca tccc tctc tcts traa trab trac tras trat trca trcc trra trst trtc trtr tsaa tsar tsat tsbc tsca tscc tssa tssr tsst tstc tsts ttab ttbb ttss tttt

-aaa- aaaas aaarc aaasa aaass aaata aabaa aabba aabra aacbc aacsa aacsb aacss aarts aasra aatsr abaab ababa ababs abaca abacs abara abasa abass abbac abbar abbas abbat abbrs abcas abccc abrac abrar abras absar abstr abtaa abtar acaca acacb acar- acara acars acass acast acats accas accra accts acrab act-r actar actas actra actrs actsa ar-ab ara-c araat arab- araba arabs araca arara arars arass arata arbab arbar arbas arbat arcas arct- arras arsac arsat artar artas artat asaba asabc asara asasa asats asbca ascar asrar assab assac assas assat assts astab astar astas astat astr- astra atara atars atats atbar atbat atrab atras atrst attar attas attra b-cas baars baart baata babar babas babbs babra bacab bacar bacas bacca bacta baraa barab barac barar baras barat barba barbs barca barcs barra barrs barsa barss barst barta barts basab basar basca basra bassa basta basts batab batac batar batas batat batra batsa batta batts bbart bbsrc bcbst bccat braas braat braca bracc bracs bract brasa brasc brass brast brats bratt brrar brrrr bsaba bstar btr-t c-a-c c-rat ca-ca caaba cabas cabra cacas caraa carab carac caras carat carb- carbs carra carrs carrt carta carts casar casas casca casta casts cata- catra catss catta catts cbars ccass ccccc craba crabb crabs crars crass