a-a a-b a-c a-t aaa aab aac aan aar aat aau ab- aba abb abc abn abr abt abu ac- aca acb acc acn acr act acu an- ana anb anc ann anr ant anu ar- ara arb arc arn arr art aru at- ata atb atc atn atr att atu au- aua aub auc aun aur aut b-u baa bab bac ban bar bat bau bba bbb bbc bbn bbr bbt bbu bca bcb bcc bcn bcr bct bcu bna bnb bnc bnn bnr bnt bnu bra brb brn brr brt bru bta btb btc btn btr btt btu bua bub buc bun bur but buu c-- caa cab cac can car cat cau cba cbb cbc cbn cbr cbt cbu cca ccb ccc ccn ccr cct ccu cn- cna cnb cnc cnn cnr cnt cnu cra crb crc crn crr crt cru cta ctb ctc ctn ctr ctt ctu cua cub cuc cun cur cut cuu naa nab nac nan nar nat nau nba nbb nbc nbn nbr nbt nbu nca ncb ncc ncn ncr nct ncu nna nnb nnc nnn nnt nnu nra nrb nrc nrn nrr nrt nru nta ntb ntc ntn ntr ntt ntu nua nub nuc nun nur nut nuu ra- raa rab rac ran rar rat rau rba rbb rbc rbn rbr rbt rbu rca rcb rcc rcn rcr rct rcu rna rnb rnc rnn rnr rnt rnu rra rrb rrc rrn rrr rrt rru rta rtb rtc rtn rtr rtt rtu rua rub ruc run rur rut ruu taa tab tac tan tar tat tau tba tbb tbc tbn tbr tbt tbu tca tcb tcc tcn tcr tct tcu tna tnb tnc tnn tnr tnt tra trb trc trn trr trt tru tta ttb ttc ttn ttr ttt ttu tua tub tuc tun tur tut tuu ua- uaa uab uac uan uar uat uau uba ubb ubc ubn ubr ubt ubu uca ucb ucc ucn ucr uct ucu un- una unb unc unn unr unt unu ur- ura urb urc urn urr urt uru uta utb utc utn utr utt utu uua uuc uun uur uut uuu

-ana a-un aaaa aaab aaac aaan aaar aaba aabb aabc aabt aaca aacb aacc aacn aacr aact aacu aana aara aarc aart aaru aata aatc aatt abaa abab abac aban abar abat abau abb- abba abbb abbr abbt abca abcb abcc abcn abcr abct abnu abra abrc abta abtu abua abun abut ac-t acaa acab acac acan acar acat acba acca accc acct accu acr- acra acrc acrr acta actc actt actu acu- acur acut ana- anaa anab anac anan anar anat anau anba anbb anbu anca ancc anct anna annb annt anrc ant- anta antr antt antu anua anub anun anut arab arac aran arar arat arau arba arc- arca arct arna arnt arr- arra arrc arrr arrt arru arta artc artr arua arub arun arut at-t ataa atab atac atan atar atat atca atcc atcr atna atra atrc atrn atru atta attn attr attu atua atub atuc atun atur auaa auca auct auna aunt aur- aura aut- baaa baan baar baat baba babb babr babu bac- baca bacc bacn bact bana banc bann banr bant banu bar- bara barb barc barn barr bart baru bata batc batn batt batu bau- baur bbau bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcnu bcra bcru bctc bcuc bnrr bnta brab brac bran brat brau brca brcb brna brrr brtc bruc brun brut btaa btan btcc btrc btrt bttb buar buat buba bubb bubu buca bucc bucu buna bunb bunn bunt bunu bur- bura burb burn burr burt buru but- buta butt caaa caab caac caan caat caba cabu cac- caca cacc cacr cana canc cann cant cara carb carc carn carr cart cat- cata catb catc catt catu cauc caut cbac cbar cbat cbbc cbca cbcc cbcn cbcr cbct cbcu cbna cbrn cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccbn ccca cccb cccc cccu ccna ccnb ccnc ccnr ccnu ccra ccrc ccrt cctb cctc cctt ccuc ccut cnaa cnac cnbc cnna cnrc cnrr cnrt cnta cntc cntr cnut crab crac cran crar crat crau crbc crbu crca crcc crcr crna crrt crtc crub crun crut ctab ctan ctba ctca ctrc ctrn ctta cttn cuan cuau cub- cuba cubb cuca cucc cucn cuna cunt cura curb curn curr curt cut- cuta cutc cutt naaa naab naac naan naar naat naba nabc nabu naca nacc nan- nana nanb nann nant nanu nara narc narn narr nart naru nata natc natt natu naur naut nbaa nbar nbbc nbca nbcc ncaa ncac ncar ncat ncba ncbc ncca nccc nccn nccr ncct nccu ncna ncnc ncra ncrc ncta nctc nctr ncua nnnn nntn nrab nrca nrna nrrc nrta ntbc ntcc ntnu ntrc ntru nttr ntuc nuan nuba nubc nuca nucu nuna nunc nunn nunt nura nurc nurn nurr nurt nuru nutt nutu raab raan raat raba rabb rabu rac- raca racc ract racu rana ranc rann rant rara rarb rata ratt ratu raua raub rauc raun raut rbbb rbbr rcac rcbc rccb rccc rcnr rctc rnbr rnnt rnut rrat rrna rrrr rrun rtan rtca rtcc ruan ruba rubb rubu ruca ruct runa runc runn runt rura rurc ruru ruta rutt rutu ruun taa- taan taar taat taba tabb tabc tabu taca tacc tact tana tann tant tanu tara tarb tarc tarn tarr tart taru tata tatb tatr tatt tatu taua taub tauc taur taut tbar tbca tbcb tbcc tbrb tbta tcca tccc tccu tcnn tctc tnbc tnca tncc tnut traa trab trac tran trat trau trca trcc trna trra trtc trtr trub truc trun trut truu ttab ttbb ttcn tttt tuan tuar tuat tuba tubb tubr tubu tuca tucc tuna tunb tunc tunn tunu tura turb turc turn turr turt turu tuta tutt tutu uabc uaca uarc uart uaru uata uatu uaua ubac ubar ubba ubra ucan ucar ucat ucbc ucca ucrc ucua ucut unaa unac unan unar unat unau unca uncc unct unna unra untb unut