a-a a-b a-c a-t aaa aab aac aak aar aas aat aau ab- aba abb abc abk abr abs abt abu ac- aca acb acc ack acr acs act acu aka akb akc akk akr aks aku ar- ara arb arc ark arr ars art aru as- asa asb asc ask asr ass ast asu at- ata atb atc atr ats att atu au- aua aub auc auk aur aus aut b-u baa bab bac bak bar bas bat bau bba bbb bbc bbk bbr bbs bbt bbu bca bcb bcc bck bcr bcs bct bcu bka bkb bkc bkk bkr bks bkt bra brb brk brr brs brt bru bsa bsb bsc bsk bsr bss bst bsu bta btb btc btk btr bts btt btu bua bub buc buk bur bus but buu c-- caa cab cac cak car cas cat cau cba cbb cbc cbk cbr cbs cbt cbu cca ccb ccc cck ccr ccs cct ccu cka ckb ckc cks ckt cra crb crc crk crr crs crt cru csa csb csc csk csr css cst csu cta ctb ctc ctk ctr cts ctt ctu cua cub cuc cuk cur cus cut cuu k-t ka- kaa kab kac kak kar kas kat kau kba kbb kbc kbk kbr kbs kbu kca kcb kcc kck kcr kcs kct kcu kkb kkc kkk kkr kks kkt kku kra krc krk krr krs krt kru ksa ksb ksc ksk ksr kss kst ksu kta ktb ktc ktk ktr kts ktt ktu kub kuc kuk kur kus kut kuu ra- raa rab rac rak rar ras rat rau rba rbb rbc rbk rbr rbs rbt rbu rca rcb rcc rcr rcs rct rcu rkb rkc rkk rks rkt rku rra rrb rrc rrk rrr rrs rrt rru rsa rsb rsc rsk rsr rss rst rsu rta rtb rtc rtk rtr rts rtt rtu rua rub ruc ruk rur rus rut ruu saa sab sac sak sar sas sat sau sba sbb sbc sbk sbr sbs sbt sbu sca scb scc sck scr scs sct scu sk- ska skb skc skk skr sks skt sku sr- sra srb src srk srr srs srt ss- ssa ssb ssc ssk ssr sss sst ssu sta stb stc stk str sts stt stu sua sub suc suk sur sus sut suu taa tab tac tak tar tas tat tau tba tbb tbc tbk tbr tbs tbt tbu tca tcb tcc tck tcr tcs tct tcu tka tkb tkc tkk tkr tks tkt tra trb trc trk trr trs trt tru tsa tsb tsc tsk tsr tss tst tsu tta ttb ttc ttk ttr tts ttt ttu tua tub tuc tuk tur tus tut tuu ua- uaa uab uac uak uar uas uat uau uba ubb ubc ubk ubr ubs ubt ubu uca ucb ucc uck ucr ucs uct ucu uka ukb ukc ukk ukr uku ur- ura urb urc urk urr urs urt uru usa usb usc usk usr uss ust usu uta utb utc utk utr uts utt utu uua uuc uur uus uut uuu

a-ak aaaa aaab aaac aaar aaas aaba aabb aabc aabt aaca aacb aacc aack aacr aacs aact aacu aaka aaku aara aarc aars aart aaru aasa aasc aass aast aasu aata aatc aatk aatt aaus abaa abab abac abak 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 abuk abus abut ac-t acaa acab acac acar acas acat acba acca accc accs acct accu acks acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt actu acu- acur acus acut akaa akar akas akca akka akku akr- akra aksa akst aksu akua arab arac arak arar aras arat arau arba arbs arc- arca arcs arct arka arks arr- arra arrc arrk arrr arrs arrt arru ars- arsa arsc arsk arst arsu arta artc artr arts arua arub arut asaa asab asac asak asar asas asat asau asba asbu asc- asca ascb ascc ascr asct aska askr asks askt asra asrc asrs asru assa assc assk assr asss asst assu asta astb astc astr asts asub asur asus at-t ataa atab atac atak atar atas atat atbs atca atcc atck atcr atcs atka atkt atra atrc atrk atru atsb atsc atst atta attr atts attu atua atub atuc atuk atur atus auaa auca auct auks aur- aura ausa aust ausu aut- auts baaa baak baar baas baat baba babb babr babs babu bac- baca bacc back bacs bact bak- baka bakr baks bakt baku bar- bara barb barc bark barr bars bart baru basa basc bask bass bast basu bata batc bats batt batu bau- bauk 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 brak bras brat brau brca brcb brka brkb brrr brrs brsb brsr brst brtc bruc brus brut bsaa bsac bsas bsat bscs bskt bsra bssc bsts btaa btcc btcs btrc btrt btss bttb btus buar buat buba bubb bubs bubu buca bucc buck bucs bucu buka bukk buku bur- bura burb burk burr burs burt buru busa busc busk buss bust busu but- buta buts butt buus caaa caab caac caas caat caba cabs cabu cac- caca cacc cack cacr caka cara carb carc cark carr cars cart casa casb casc cask casr cass cast casu cat- cata catb catc cats catt catu cauc cauk caus caut cbac cbar cbat cbbc cbbs cbca cbcc cbcr cbcs cbct cbcu cbka cbkr 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 ckac ckat ckbc ckck ckcs ckrc cksa cksb ckst cktb ckts crab crac crar cras crat crau crbc crbu crca crcc crcr crkc crrt crsa crss crst crtc crts crub cruk crus crut csaa csab