a-a a-b a-c a-t aaa aab aac aak aar aat aau ab- aba abb abc abk abr abt abu ac- aca acb acc ack acr act acu aka akb akc akk akr aku ar- ara arb arc ark arr art aru at- ata atb atc atr att atu au- aua aub auc auk aur aut b-u baa bab bac bak bar bat bau bba bbb bbc bbk bbr bbt bbu bca bcb bcc bck bcr bct bcu bka bkb bkc bkk bkr bkt bra brb brk brr brt bru bta btb btc btk btr btt btu bua bub buc buk bur but buu c-- caa cab cac cak car cat cau cba cbb cbc cbk cbr cbt cbu cca ccb ccc cck ccr cct ccu cka ckb ckc ckt cra crb crc crk crr crt cru cta ctb ctc ctk ctr ctt ctu cua cub cuc cuk cur cut cuu k-t ka- kaa kab kac kak kar kat kau kba kbb kbc kbk kbr kbu kca kcb kcc kck kcr kct kcu kkb kkc kkk kkr kkt kku kra krc krk krr krt kru kta ktb ktc ktk ktr ktt ktu kub kuc kuk kur kut kuu ra- raa rab rac rak rar rat rau rba rbb rbc rbk rbr rbt rbu rca rcb rcc rcr rct rcu rkb rkc rkk rkt rku rra rrb rrc rrk rrr rrt rru rta rtb rtc rtk rtr rtt rtu rua rub ruc ruk rur rut ruu taa tab tac tak tar tat tau tba tbb tbc tbk tbr tbt tbu tca tcb tcc tck tcr tct tcu tka tkb tkc tkk tkr tkt tra trb trc trk trr trt tru tta ttb ttc ttk ttr ttt ttu tua tub tuc tuk tur tut tuu ua- uaa uab uac uak uar uat uau uba ubb ubc ubk ubr ubt ubu uca ucb ucc uck ucr uct ucu uka ukb ukc ukk ukr uku ur- ura urb urc urk urr urt uru uta utb utc utk utr utt utu uua uuc uur uut uuu

a-ak aaaa aaab aaac aaar aaba aabb aabc aabt aaca aacb aacc aack aacr aact aacu aaka aaku aara aarc aart aaru aata aatc aatk aatt abaa abab abac abak abar abat abau abb- abba abbb abbr abbt abca abcb abcc abcr abct abra abrc abta abtu abua abuk abut ac-t acaa acab acac acar acat acba acca accc acct accu acr- acra acrc acrr acta actc actt actu acu- acur acut akaa akar akca akka akku akr- akra akua arab arac arak arar arat arau arba arc- arca arct arka arr- arra arrc arrk arrr arrt arru arta artc artr arua arub arut at-t ataa atab atac atak atar atat atca atcc atck atcr atka atkt atra atrc atrk atru atta attr attu atua atub atuc atuk atur auaa auca auct aur- aura aut- baaa baak baar baat baba babb babr babu bac- baca bacc back bact bak- baka bakr bakt baku bar- bara barb barc bark barr bart baru bata batc batt batu bau- bauk baur bbau bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcra bcru bctc bcuc brab brac brak brat brau brca brcb brka brkb brrr brtc bruc brut btaa btcc btrc btrt bttb buar buat buba bubb bubu buca bucc buck bucu buka bukk buku bur- bura burb burk burr burt buru but- buta butt caaa caab caac caat caba cabu cac- caca cacc cack cacr caka cara carb carc cark carr cart cat- cata catb catc catt catu cauc cauk caut cbac cbar cbat cbbc cbca cbcc cbcr cbct cbcu cbka cbkr cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccu ccra ccrc ccrt cctb cctc cctt ccuc ccut ckac ckat ckbc ckck ckrc cktb crab crac crar crat crau crbc crbu crca crcc crcr crkc crrt crtc crub cruk crut ctab ctba ctca ctrc ctta cuau cub- cuba cubb cuca cucc cuck cuk- cuka cura curb curr curt cut- cuta cutc cutt kaaa kaab kaak kaar kaat kaba kabb kabc kabr kabu kacb kacc kact kacu kaka kakc kakk kakt kaku kara karb kark karr kart karu kat- kata katb katc katk katr katt katu kau- kaub kauc kauk kaur kbaa kbab kbac kbak kbar kbat kbba kbbb kbbc kbbk kbbr kbbt kbbu kbca kbcb kbck kbcr kbct kbcu kbkb kbkk kbkr kbra kbrb kbrc kbrk kbrt kbru kbta kbtb kbtc kbtk kbtr kbtt kbua kbub kbuc kbuk kbur kbut kbuu kcaa kcab kcac kcar kcat kcau kcba kcbc kcbk kcbr kcbu kcca kccb kccc kcck kccr kcct kccu kckc kckk kckr kcrc kcrr kcrt kcru kcta kctb kctc kctu kcua kcub kcuk kkaa kkac kkar kkat kkba kkbb kkbr kkbt kkcb kkck kkcr kkct kkkk kkrb kkrc kkrk kkrr kkrt kktc kktk kktu kkua kkut kkuu krab krac krak krar krat krba krbb krbk krbr krbt krca krcb krcc krcu krka krkc krkk krkr krku krrb krrc krrk krrr krrt krta krtc krtk krtr krua kruc kruk krur ktaa ktak ktar ktat ktba ktbb ktbc ktbr ktbt ktbu ktcc ktck ktcr ktkb ktkc ktkk ktkr ktkt ktku ktrb ktrc ktrk ktrr ktrt ktru kttc kttk kttr kttt kttu ktub ktuc kuac kuar kuat kuau kuba kubb kubc kubr kubu kuca kucb kucc kucr kuka kukk kuku kura kurb kurk kurr kurt kuru kuta kutr kutt kutu kuub kuuk kuur kuuu raab raak raat raba rabb rabk rabu rac- raca racc rack ract racu raka rakk rakt raku rara rarb rark rata ratk ratt ratu raua raub rauc rauk raut rbbb rbbr rcac rcbc rccb rccc rctc rrat rrrr rtca rtcc ruba rubb rubu ruca ruck ruct ruka rukk ruku rura rurc ruru ruta rutt rutu taa- taar taat taba tabb tabc tabu taca tacc tack tact taka takk takt taku tara tarb tarc tark tarr tart taru tata tatb tatr tatt tatu taua taub tauc tauk taur taut tbar tbca tbcb tbcc tbrb tbta tcca tccc tccu tctc tkac traa trab trac trak trat trau trca