a-a a-b a-t aaa aab aak aar aas aat ab- aba abb abk abr abs abt aka akb akk akr aks ar- ara arb ark arr ars art as- asa asb ask asr ass ast at- ata atb atr ats att baa bab bak bar bas bat bba bbb bbk bbr bbs bbt bka bkb bkk bkr bks bkt bra brb brk brr brs brt bsa bsb bsk bsr bss bst bta btb btk btr bts btt k-t ka- kaa kab kak kar kas kat kba kbb kbk kbr kbs kkb kkk kkr kks kkt kra krk krr krs krt ksa ksb ksk ksr kss kst kta ktb ktk ktr kts ktt ra- raa rab rak rar ras rat rba rbb rbk rbr rbs rbt rkb rkk rks rkt rra rrb rrk rrr rrs rrt rsa rsb rsk rsr rss rst rta rtb rtk rtr rts rtt saa sab sak sar sas sat sba sbb sbk sbr sbs sbt sk- ska skb skk skr sks skt sr- sra srb srk srr srs srt ss- ssa ssb ssk ssr sss sst sta stb stk str sts stt taa tab tak tar tas tat tba tbb tbk tbr tbs tbt tka tkb tkk tkr tks tkt tra trb trk trr trs trt tsa tsb tsk tsr tss tst tta ttb ttk ttr tts ttt

a-ak aaaa aaab aaar aaas aaba aabb aabt aaka aara aars aart aasa aass aast aata aatk aatt abaa abab abak abar abas abat abb- abba abbb abbr abbs abbt abra abrs abs- absa abss abta abts akaa akar akas akka akr- akra aksa akst arab arak arar aras arat arba arbs arka arks arr- arra arrk arrr arrs arrt ars- arsa arsk arst arta artr arts asaa asab asak asar asas asat asba aska askr asks askt asra asrs assa assk assr asss asst asta astb astr asts at-t ataa atab atak atar atas atat atbs atka atkt atra atrk atsb atst atta attr atts baaa baak baar baas baat baba babb babr babs bak- baka bakr baks bakt bar- bara barb bark barr bars bart basa bask bass bast bata bats batt bbas bbbb bbbs brab brak bras brat brka brkb brrr brrs brsb brsr brst bsaa bsas bsat bskt bsra bsts btaa btrt btss bttb kaaa kaab kaak kaar kaas kaat kaba kabb kabr kaka kakk kaks kakt kara karb kark karr kars kart kas- kasa kasb kask kasr kass kast kat- kata katb katk katr kats katt kbaa kbab kbak kbar kbas kbat kbba kbbb kbbk kbbr kbbs kbbt kbkb kbkk kbkr kbra kbrb kbrk kbrt kbsa kbsb kbsk kbsr kbss kbst kbta kbtb kbtk kbtr kbts kbtt kkaa kkar kkat kkba kkbb kkbr kkbs kkbt kkkk kkrb kkrk kkrr kkrs kkrt kksa kksr kkss kkst kktk kkts krab krak krar kras krat krba krbb krbk krbr krbt krka krkk krkr krks krrb krrk krrr krrs krrt krsa krsk krsr krss krst krta krtk krtr krts ksab ksak ksar ksas ksat ksba ksbr ksbs kska kskb 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 ktkb ktkk ktkr ktks ktkt ktrb ktrk ktrr ktrs ktrt ktsa ktsr ktst kttk kttr ktts kttt raab raak raas raat raba rabb rabk rabs raka rakk rakt rara rarb rark rars rasa rask rass rast rata ratk rats ratt rbbb rbbr rbbs rbss rbst rkss rkts rras rrat rrrr rsaa rssa rsts rtas rtss rtts saab saak saar saas saat saba sabb sabr sabs saka sakb sakk saks sara sark sarr sars sart sasa sask sass sast sata satb satr sats satt sbaa sbar sbas sbbs sbrk sbsa sbst sbtk skab skar skat skra skrt skss sras srta srtr ssaa ssab ssas ssat ssbr ssra ssrs sssa sssb ssss ssta sstb ssts stab stak star stas stat stbs stks stra strk strs stss sttr taa- taar taas taat taba tabb tabs taka takk taks takt tara tarb tark tarr tars tart tasa tasb task tasr tass tast tata tatb tatr tats tatt tbar tbas tbbs tbrb tbst tbta tkts traa trab trak tras trat trra trst trtr tsaa tsar tsat tsks tssa tssr tsst tsts ttab ttbb ttss tttt

-aaa- aaaas aaasa aaass aaata aabaa aabba aabra aarts aasra aatsr abaab ababa ababs abaka abara abasa abask abass abbar abbas abbat abbrs abkar abrak abrar abras absar abstr abtaa abtar akaba akasa akata akbar akbas akkas akkra akrak akrar aksar aktas ar-ab araat arab- araba arabs araks arara arars arass arata arbab arbar arbas arbat arkar arkas arkat arrak arras arsat artar artas artat asaak asaba asaka asara asasa asats asbak askar askas asksa asrar assab assas assat assts astab astar astas astat astr- astra ataka atara atars atask atats atbar atbat atrab atrak atras atrst attak attar attas attra b-r-k baars baart baata babak babar babas babbs babka babra babsk bakar bakka bakra baksa bakst baraa barab barak barar baras barat barba barbs bark- barka barks barra barrs barsa barss barst barta barts basab basak basar baska basks baskt basra bassa basta basts batab batak batar batas batat batka batra batsa batta batts bbart braak braas braat brasa brask brass brast brats bratt brrar brrrr bsaba bskts bstar btr-t k-rab k-t-b k-tab kaaba kaaks kabaa kabab kabak kabar kabas kabat kabba kabsa kabta kakar kakas kakka kakra karak karas karat karka karsa karsk karst kart- karta karts kasab kasak kasba kaska kasra kassa kasta kata- katak katar katas katat katra katsa katta kraak kraar kraka krars krass kratt ksars kstar ra-ra raaba raasa rabab rabak rabas rabat rabba rabta rakaa rakab rakat rasak rasar rasas rasat raska rasra rassa rasta ratak ratas ratba ratka ratra ratta rrsta rt-rk sa-ra saaba saabs saara saasa sabak sabar sabas sabat sabra sabsa sakar sakka sakra saksa sakta saraa sarab sarak saras sarat sarka sarks sarra sarsa sarta sarts sasak saska sassa sat-b satat satka satra satta sbata skaar skara skart skats skrat