-al a-a a-b a-c a-t aaa aab aac aal aar aat aau ab- aba abb abc abl abr abt abu ac- aca acb acc acl acr act acu al- ala alb alc all alr alt alu ar- ara arb arc arl arr art aru at- ata atb atc atl atr att atu au- aua aub auc aul aur aut b-u baa bab bac bal bar bat bau bba bbb bbc bbl bbr bbt bbu bca bcb bcc bcl bcr bct bcu bla blb blc bll blr blt blu bra brb brl brr brt bru bta btb btc btl btr btt btu bua bub buc bul bur but buu c-- caa cab cac cal car cat cau cba cbb cbc cbl cbr cbt cbu cca ccb ccc ccl ccr cct ccu cl- cla clb clc cll clr clt clu cra crb crc crl crr crt cru cta ctb ctc ctl ctr ctt ctu cua cub cuc cul cur cut cuu la- laa lab lac lal lar lat lau lba lbb lbc lbl lbr lbt lbu lca lcb lcc lcl lcr lct lcu lla llb llc lll llr llt llu lra lrb lrc lrr lrt lru lta ltb ltc ltl ltr ltt ltu lua lub luc lul lur lut luu ra- raa rab rac ral rar rat rau rba rbb rbc rbl rbr rbt rbu rca rcb rcc rcl rcr rct rcu rla rlc rll rlr rlt rlu rra rrb rrc rrl rrr rrt rru rta rtb rtc rtl rtr rtt rtu rua rub ruc rur rut ruu taa tab tac tal tar tat tau tba tbb tbc tbl tbr tbt tbu tca tcb tcc tcl tcr tct tcu tla tlc tll tlr tlt tlu tra trb trc trl trr trt tru tta ttb ttc ttl ttr ttt ttu tua tub tuc tul tur tut tuu ua- uaa uab uac ual uar uat uau uba ubb ubc ubl ubr ubt ubu uca ucb ucc ucl ucr uct ucu ula ulb ulc ull ulr ult ulu ur- ura urb urc url urr urt uru uta utb utc utl utr utt utu uua uuc uur uut uuu

aaaa aaab aaac aaal aaar aaba aabb aabc aabl aabt aaca aacb aacc aacl aacr aact aacu aala aalc aall aalu aara aarc aart aaru aata aatc aatt abaa abab abac abal abar abat abau abb- abba abbb abbr abbt abca abcb abcc abcl abcr abct abla abra abrc abta abtu abua abul abut ac-t acaa acab acac acar acat acba acbl acca accc acct accu acla aclc aclr aclu acr- acra acrc acrr acta actc actl actt actu acu- acul acur acut alaa alac alal alar alat alau alb- alba albc albu alca alcc all- alla alll allr allu alta alua alur alut arab arac aral arar arat arau arba arc- arca arct arla arr- arra arrc arrr arrt arru arta artc artr arua arub arul arut at-l at-t ataa atab atac atal atar atat atca atcc atcl atcr atla atra atrc atru atta attr attu atua atub atuc atul atur auaa auca auct aul- aula aull ault aulu aur- aura aut- baaa baal baar baat baba babb babr babu bac- baca bacc bact bala balc ball balt balu bar- bara barb barc barr bart baru bata batc batt batu bau- baul baur bbau bbbb bblb bbrc bcaa bcar bcat bcbc bcca bccc bccl bcra bcru bctc bcuc blaa blab blac blat blau blbt blcu blrc blub blur blut brab brac brat brau brca brcb brrr brtc bruc brut btaa btcc btcl btla btrc btrt bttb bual buar buat buba bubb bubu buca bucc bucu bula bulb bull bult bulu bur- bura burb burl burr burt buru but- buta butt caaa caab caac caal caat caba cabu cac- caca cacc cacr cala calc call calt calu cara carb carc carl carr cart cat- cata catb catc catt catu cauc caul caut cbac cbal cbar cbat cbbc cbca cbcc cbcl cbcr cbct cbcu cblb cblc cbrl cbrt cbta cbtc cbtl ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccl cccu ccla cclc ccra ccrc ccrl ccrt cctb cctc cctl cctt ccuc ccut clab clar clat clau clra cltb cltc club clut crab crac crar crat crau crbc crbu crca crcc crcr crrt crtc crtl crub crut ctab ctal ctba ctca ctrc ctrl ctta cuau cub- cuba cubb cuca cucc cula culb culc cull cult cura curb curl curr curt cut- cuta cutc cutt laaa laac laal laar laat laba labr labu laca lacc lacl lact lacu lala lall lalu lara larb larc larr lart laru lata latc latt latu laub laul laur laut lbar lbcc lblr lbrt lcac lcat lcbc lcca lccc lcra lcrl lctl llat llcc lllc llll lrac lral lrat lrba lrrc lrrr lrta ltac ltbl ltcc ltra lttc lttr ltuc luau luba luca lula lull lulu lura lurt luta luua raab raat raba rabb rabl rabu rac- raca racc ract racu rala ralb rall ralt rara rarb rata ratt ratu raua raub rauc raul raut rbbb rbbr rbcl rcac rcbc rccb rccc rctc rlab rlua rrat rrrr rtca rtcc rtlt ruba rubb rubu ruca ruct rula rull rura rurc ruru ruta rutl rutt rutu taa- taal taar taat taba tabb tabc tabl tabu taca tacc tacl tact tala talc tall talu tara tarb tarc tarr tart taru tata tatb tatr tatt tatu taua taub tauc taul taur taut tbar tbca tbcb tbcc tbrb tbta tcca tccc tccu tctc tcul tlac traa trab trac tral trat trau trca trcc trcl trra trtc trtr trub truc trut truu ttab ttbb tttt ttul tual tuar tuat tuba tubb tubr tubu tuca tucc tula tull tulu tura turb turc turr turt turu tuta tutl tutt tutu uabc uaca uarc uart uaru uata uatu uaua ubac ubal ubar ubba ubla ubra ucal ucar ucat ucbc ucca ucla ucrc ucua ucut ulaa ular ulbc ulcc ulla ullr ulta ultt ulua ulul urac ural urat urau urba urca urla urra urur urut utac utal utau uttu uulu uuta uuuu