a-a a-b a-t aaa aab aad aak aar aas aat ab- aba abb abd abk abr abs abt ad- ada adb add adk adr ads adt aka akb akd akk akr aks ar- ara arb ard ark arr ars art as- asa asb asd ask asr ass ast at- ata atb atd atr ats att baa bab bad bak bar bas bat bba bbb bbd bbk bbr bbs bbt bda bdb bdd bdk bdr bds bdt bka bkb bkk bkr bks bkt bra brb brd brk brr brs brt bsa bsb bsd bsk bsr bss bst bta btb btd btk btr bts btt daa dab dad dak dar das dat dba dbb dbd dbk dbr dbs dbt dda ddb ddd ddk ddr dds ddt dka dkb dkk dkr dks dkt dra drb drd drk drr drs drt dsa dsb dsd dsk dsr dss dst dta dtb dtd dtk dtr dts dtt k-t ka- kaa kab kad kak kar kas kat kba kbb kbd kbk kbr kbs kda kdb kdk kdr kds kdt kkb kkk kkr kks kkt kra krd krk krr krs krt ksa ksb ksd ksk ksr kss kst kta ktb ktk ktr kts ktt ra- raa rab rad rak rar ras rat rba rbb rbd rbk rbr rbs rbt rda rdb rdd rdr rds rdt rkb rkk rks rkt rra rrb rrd rrk rrr rrs rrt rsa rsb rsd rsk rsr rss rst rta rtb rtd rtk rtr rts rtt saa sab sad sak sar sas sat sba sbb sbd sbk sbr sbs sbt sda sdb sdd sdk sdr sds sdt sk- ska skb skd skk skr sks skt sr- sra srb srd srk srr srs srt ss- ssa ssb ssd ssk ssr sss sst sta stb std stk str sts stt taa tab tad tak tar tas tat tba tbb tbd tbk tbr tbs tbt tda tdb tdd tdk tdr tds tdt tka tkb tkk tkr tks tkt tra trb trd trk trr trs trt tsa tsb tsd tsk tsr tss tst tta ttb ttd ttk ttr tts ttt

a-ak aaaa aaab aaad aaar aaas aaba aabb aabd aabt aada aads aadt aaka aara aard aars aart aasa aasd aass aast aata aatk aatt abaa abab abad abak abar abas abat abb- abba abbb abbr abbs abbt abda abra abrs abs- absa absd abss abta abts adaa adab adad adak adar adas adat adba adda addd addr adds adra adrs adsa adsr adss adst adta adts akaa akar akas akka akr- akra aksa akst arab arad arak arar aras arat arba arbs arda ards arka arks arr- arra arrk arrr arrs arrt ars- arsa arsd arsk arst arta artr arts asaa asab asad asak asar asas asat asba asda asds aska askr asks askt asra asrs assa assd assk assr asss asst asta astb astr asts at-t ataa atab atad atak atar atas atat atbs atdt atka atkt atra atrk atsb atst atta attr atts baaa baad baak baar baas baat baba babb babr babs bada badb badd badr bads bak- baka bakr baks bakt bar- bara barb bard bark barr bars bart basa bask bass bast bata bats batt bbad bbas bbbb bbbs bbdd bd-r bdsd brab brad brak bras brat brda brds brdt brka brkb brrr brrs brsb brsr brst bsaa bsas bsat bsbd bskt bsra bsrd bssd bsts btaa btdt btrt btss bttb daab daad daar daas daba dabb dabs dabt dada dads daka daks dara darb dard dark darr dars dart dasa dasb dasd dask dass dast data datr dats datt dbar dbas dbrs dbsa dbss dbtt dddd ddss ddts dkba draa drab drad drak drar dras drat drba drda drra drrs drsa dsba dsda dsdr dsrr dssa dsst dsts dtaa dtss kaaa kaab kaak kaar kaas kaat kaba kabb kabd kabr kad- kada kadd kadr kads kadt kaka kakk kaks kakt kara karb kard kark karr kars kart kas- kasa kasb kask kasr kass kast kat- kata katb katd katk katr kats katt kbaa kbab kbad kbak kbar kbas kbat kbba kbbb kbbd kbbk kbbr kbbs kbbt kbdb kbdr kbds kbkb kbkk kbkr kbra kbrb kbrd kbrk kbrt kbsa kbsb kbsk kbsr kbss kbst kbta kbtb kbtk kbtr kbts kbtt kdaa kdab kdad kdak kdar kdat kdbb kdbr kdbs kddb kddd kddk kddr kdka kdkb kdkd kdkk kdkr kdkt kdrb kdrs kdsd kdsk kdsr kdss kdst kdta kdtd kdtr kkaa kkar kkat kkba kkbb kkbd kkbr kkbs kkbt kkda kkdd kkdt kkkk kkrb kkrk kkrr kkrs kkrt kksa kksd kksr kkss kkst kktk kkts krab krad krak krar kras krat krba krbb krbd krbk krbr krbt krda krdd krdr krds krka krkd krkk krkr krks krrb krrk krrr krrs krrt krsa krsd krsk krsr krss krst krta krtk krtr krts ksab ksak ksar ksas ksat ksba ksbr ksbs ksdk ksdr ksds kska kskb kskd kskk kskr ksks ksra ksrb ksrr ksrs ksrt kssa kssr ksss ksst ksta kstb kstk kstr ksts kstt ktaa ktak ktar ktas ktat ktba ktbb ktbr ktbt ktdb ktdd ktdk ktdr ktkb ktkk ktkr ktks ktkt ktrb ktrk ktrr ktrs ktrt ktsa ktsd ktsr ktst kttk kttr ktts kttt raab raad raak raas raat raba rabb rabk rabs rada radd radr rads radt raka rakk rakt rara rarb rark rars rasa rasd rask rass rast rata ratk rats ratt rbbb rbbr rbbs rbds rbsd rbss rbst rdas rkss rkts rrad rras rrat rrrr rsaa rsdd rsds rssa rsts rtas rtdt rtss rtts saab saad saak saar saas saat saba sabb sabr sabs sada sadb sadd sadr sads sadt saka sakb sakk saks sara sard sark sarr sars sart sasa sasd sask sass sast sata satb satd satr sats satt sbaa sbar sbas sbbs sbds sbrk sbsa sbsd sbst sbtk sdak sdba sdds sdrs sdss skab skad skar skat skra skrt sksd skss sras srsd srta srtr ssaa ssab ssas ssat ssbr ssdd ssra ssrs sssa sssb ssss ssta sstb sstd ssts stab stad stak star stas stat stbd stbs stds stks stra strd strk strs stss sttd sttr