a-do aaaa aaab aaac aaad aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aaco aacr aact aacu aada aadc aadt aadu aaoo aara aarc aard aaro aart aaru aata aatc aatt abaa abab abac abad abar abat abau abb- abba abbb abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo abdu aboa abob abod aboo abor abot abou abra abrc abro abta abtu abua abud abut ac-t acaa acab acac acad acar acat acba acca accc accd acco acct accu acda acdb acdc acdt acoa acod acor acot acou acr- acra acrc acro acrr acta actc acto actt actu acu- acuo acur acut adaa adab adac adad adao adar adat adba adbc adcc adda addc addd addo addr addu adob adoc adod adoo ador adot adra adro adta adua adub adur aoba aoca aora aorb aort aotc aotd aout arab arac arad arar arat arau arba arc- arca arco arct arda ardc ardo ardu aroa arob arod aroo aror arr- arra arrc arro arrr arrt arru arta artc arto artr arua arub arud arut at-t ataa atab atac atad atar atat atca atcc atco atcr atdt atob atoc atod ator atot atra atrc atro atru atta atto attr attu atua atub atuc atur auaa auca auct audc audo aur- aura aurd auro aut- auto baaa baad baar baat baba babb babo babr babu bac- baca bacc baco bact bada badb badd bado badr badu bar- bara barb barc bard baro barr bart baru bata batc bato batt batu bau- baud baur bbad bbau bbbb bbdd bbdo bbrc bcaa bcar bcat bcbc bcca bccc bcda bcor bcra bcru bctc bcuc bd-r bdbc bddc boab boac boad boar boat boba bobb bobo bobu boca boco bocu boda bodb bodo bodu boob booc bood boor boot bor- bora bord boro borr bort boru bota botb botd boto bott boua boud bour bout brab brac brad brao brat brau brca brcb brda brdo brdt broa brob broc brod broo bror brot brou brrr brtc bruc brud brut btaa btcc btdt btob btor btrc btrt bttb buad buar buat buba bubb bubo bubu buca bucc buco bucu buda budb budd budo budu bur- bura burb burd buro burr burt buru but- buta buto butt c-bo c-cd caaa caab caac caat caba cabo cabu cac- caca cacc caco cacr cada cadc cadd cado cadr cadu caod caor cara carb carc card caro carr cart cat- cata catb catc catd cato catt catu cauc cauo caut cbac cbar cbat cbbc cbca cbcc cbcr cbct cbcu cbdb cbdc cbdo cbot cbrd cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc cccu ccdc ccdr ccob ccoc ccod ccra ccrc ccrt cctb cctc cctt ccuc ccut cd-r cdaa cdac cdad cdba cdda cddb cddr cdot coad coat coba cobb cobo cobu coca coco coct cocu coda codd coob cood coot cor- cora corb corc cord coro corr cort cota cotb cotc coto cott cotu coua coub coud cour cout crab crac crar crat crau crbc crbu crca crcc crcr crda crdc crob croc crod croo cror crot crrt crtc crub crud crut ctab ctba ctca ctor ctot ctrc ctta cuau cub- cuba cubb cuca cucc cuda cura curb curd curo curr curt cut- cuta cutc cuto cutt d-bo daab daad daar daau daba dabb dabo dabt dabu daca dact dada dado dadu daou dara darb darc dard daro darr dart daru data dato datr datt datu daub daud daur daut dbar dbcc dbtt dcbc dcca dccb dccc dcct dccu dcdb dcra dctc dddd ddoc ddot ddrc ddub doab doar doat doba dobb dobu doca doco doct docu dod- doda dodd dodo doob dood door doot dora dorc dord doro dorr dort doru dota dotd doto dott doub douc doud dour dout draa drab drac drad drar drat drau drba drbc drca drda drob drod drot drou drra drua drub drut druu dtaa dtac dtcc dtor dtot duaa duab duad duar duat dub- duba dubb dubc dubu duca duco duct duda dudd dudo dudu duo- dura duro durt duru duta duur duut oaau oara obad obba obbo obdt obor obot obra obro obtd ocab ocac ocad ocat ocbc occa occc occt ocra ocro ocrr oct- octa octo ocur odac odbo odda oddd odoo odor odot odou odra odtu odur ooaa ooba oocr ooda oooo oora oord oort ootb orab orac orad orao orar orat orba orbb orbo orbu orca orco orda ordo ordu oro- oror orot orra orro orta ortc orto orub otac otar otbd otcd oto- otoo otor otra otro otta otto ottu otur ouac ouad ouat oucc oudc our- oura ouro ourt out- outa outb outo ouu- raab raad raat raba rabb rabo rabu rac- raca racc raco ract racu rada radc radd rado radr radt radu raob raoc rara rarb raro rata rato ratt ratu raua raub rauc raud raut rbbb rbbr rcac rcbc rcbo rccb rccc rcdc rcrd rctc rdac rdoc roab road roar roat rob- roba robb robo robt robu roca rocc roco roda rodd rodo roob rood roor root rora rorc roro rort roru rota rotc roto rotr rott roua roub roud rout rrad rrat rrrr rtca rtcc rtdt ruad ruba rubb rubu ruca ruct ruda rudd rudo rura rurc rurd ruro ruru ruta ruto rutt rutu ruud taa- taar taat taba tabb tabc tabo tabu taca tacc taco tact tada tado taoa taor taou tara tarb tarc tard taro tarr tart taru tata tatb tato tatr tatt tatu taua taub tauc taur taut tbar tbca tbcb tbcc tbcd tbrb tbta tcad tcca tccc tccu tcdd tctc tdac tddb tdor tdra toab toad toat toau toba tobo tobt tobu toca toco toda todd todo todt todu tooa tood toor toot tora torc tord toro torr tort toru tota totc totd toto totr tott tour tout traa trab trac trad trao trat trau trca trcc troa troc trod troo trot trou trra trtc trtr trub truc trud trut truu ttab ttbb tttt tuao tuar tuat tuba tubb