a-be aaaa aaab aaac aaae aaar aaba aabb aabc aabt aaca aacb aacc aace aaco aacr aact aacu aaea aaec aaoe aaoo aara aarc aare aaro aart aaru aata aatc aatt abaa abab abac abae abar abat abau abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcr abct abec abee aber abet aboa abob aboo abor abot abou abra abrc abro abta abtu abua abue abut ac-t acaa acab acac acae acar acat acba acca accc acce acco acct accu ace- acea acec acer acet acoa acoe acor acot acou acr- acra acrc acre acro acrr acta actc acte acto actt actu acu- acue acuo acur acut aeac aecb aect aeer aer- aera aerc aero aeta aetc aeto aetr aett aoba aoca aoce aoeu aora aorb aort aotc aout arab arac arae arar arat arau arba arbe arc- arca arce arco arct area arec aree areo aret areu aroa arob aroe aroo aror arr- arra arrc arre arro arrr arrt arru arta artc arte arto artr arua arub arue arut at-t ataa atab atac atae atar atat atca atcc atco atcr atea atec atee ateo ater atob atoc atoe ator atot atra atrc atre atro atru atta atte atto attr attu atua atub atuc atur auaa aube auca auce auct auer aur- aura aure auro aut- aute auto baaa baar baat baba babb babe babo babr babu bac- baca bacc bace baco bact baer bar- bara barb barc bare baro barr bart baru bata batc bate bato batt batu bau- baur bbau bbbb bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcor bcra bcru bctc bcuc bear beat beau beba bebb bebe bebo beca becu beeb beer beet beo- beor beot bera berc bere bero berr bert beru beta betc bete beto bett betu beur boab boac boar boat boba bobb bobe bobo bobu boca boce boco bocu boea boec boee boeo boer boet boob booc booe boor boot bor- bora bore boro borr bort boru bota botb bote boto bott boua boue bour bout brab brac brae brao brat brau brca brcb brce brea breb brec bree breo brer bret broa brob broc broe broo bror brot brou brrr brtc bruc brue brut btaa btcc btec btob btor btrc btrt bttb buar buat buba bubb bube bubo bubu buca bucc buce buco bucu buea buer bueu bur- bura burb bure buro burr burt buru but- buta bute buto butt c-bo caaa caab caac caat caba cabe cabo cabu cac- caca cacc cace caco cacr caec caer caeu caor cara carb carc care caro carr cart cat- cata catb catc cate cato catt catu cauc cauo caut cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbea cbec cbee cber cbet cbot cbre cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccu ccee ccob ccoc ccra ccrc ccre ccrt cctb cctc cctt ccuc ccut ceac cear ceat ceba cebu cec- ceca cece ceco cect ceeb ceec ceor ceou cer- cera cerc cere cero cert cet- ceta cete ceto coat coba cobb cobe cobo cobu coca coce coco coct cocu coob coot cor- cora corb corc core coro corr cort cota cotb cotc cote coto cott cotu coua coub coue cour cout crab crac crar crat crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creo cret creu crob croc croe croo cror crot crrt crtc crub crue crut ctab ctae ctba ctca ctec ctor ctot ctrc ctta cuau cub- cuba cubb cube cuca cucc cuce cuer cura curb cure curo curr curt cut- cuta cutc cute cuto cutt eaba eaca eacc eaec eara earb eare earo eart eata eate ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ebru ebur ecaa ecac ecao ecar ecat ecbc ecbe ecca eccb eccc ecce ecco ecct eco- ecot ecou ecra ecrc ecrr ecru ect- ecta ectc ecto ecua eeca eeea eeee eeoc eera eerc eero eeta eetc eete eetu eora eore eota eotc eoto erat erau erba erbb erbe erca ercc erce ereb erec erer eret erob eroc eroe eroo erra errc erre erro erta ertu erua erub eruc erur etat etbc etbr etcc etco etec etee eter etoe etra etre etro etta ette etto ettu etua euba eubc euer eur- eura eurc eure euro eurt o-eo oaau oaer oara oare oate obba obbo obea obec ober obet oboe obor obot obra obre obro ocab ocac ocat ocbc occa occc occt oce ocee ocet ocra ocre ocro ocrr oct- octa octe octo ocur oec- oeca oecc oeec oera oere oeta ooaa ooba oobe oocr ooer oooo oora oore oort ootb orab orac orae orao orar orat orba orbb orbe orbo orbu orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orot orra orro orta ortc orte orto orub otac otar otea otee oter oto- otoe otoo otor otra otre otro otta otte otto ottu otur ouac ouat oucc ouea ouer our- oura oure ouro ourt out- outa outb oute outo ouu- raab raat raba rabb rabe rabo rabu rac- raca racc race raco ract racu raec raer raob raoc rara rarb rare raro rata rate rato ratt ratu raua raub rauc raue raut rbbb rbbr rcac rcbc rcbo rccb rccc rcet rctc rea- reac reae reao rear reat reau reba rebb rebe rebo rebu reca recc rece recr rect recu reeb reet reot reou rera rere rero rert reru reta rete reto retr rett reue reut reuu roab roar roat rob- roba robb robe robo robt robu roca rocc roce roco roea roer roet roob roor root rora rorc rore roro rort roru rota rotc rote roto rotr rott roua roub roue rout rrat rrrr rtca rtcc rtce rtee ruba rubb rube rubu ruca ruce ruct ruer ruet rura rurc rure ruro ruru ruta rute ruto rutt rutu taa- taar taat taba tabb tabc tabe tabo tabu taca tacc tace taco tact taec taer taoa taor taou tara tarb tarc tare taro tarr