a-be aaaa aaab aaac aaae aaar aaba aabb aabc aaca aacb aacc aace aaco aacr aacu aaea aaec aaoe aaoo aara aarc aare aaro aaru abaa abab abac abae abar abau abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob aboo abor abou abra abrc abro abua abue acaa acab acac acae acar acba acca accc acce acco accu ace- acea acec acer acoa acoe acor acou acr- acra acrc acre acro acrr acu- acue acuo acur aeac aecb aeer aer- aera aerc aero aoba aoca aoce aoeu aora aorb aqar aqra aqu- aqua aque aquo arab arac arae araq arar arau arba arbe arc- arca arce arco area arec aree areo areu aroa arob aroe aroo aror arq- arqa arr- arra arrc arre arro arrr arru arua arub arue aruq auaa aube auca auce auer aur- aura aure auro baaa baar baba babb babe babo babr babu bac- baca bacc bace baco baer baqa bar- bara barb barc bare baro barq barr baru bau- baur bbau bbbb bbbq bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcor bcra bcru bcuc bear beau beba bebb bebe bebo beca becu beeb beer beo- beor beqa bera berc bere bero berr beru beur boab boac boar boba bobb bobe bobo bobu boca boce boco bocq bocu boea boec boee boeo boer boob booc booe boor boqe bor- bora bore boro borr boru boua boue bour bque brab brac brae brao brau brca brcb brce brea breb brec bree breo brer broa brob broc broe broo bror brou brrr bruc brue buar buba bubb bube bubo bubq bubu buca bucc buce buco bucu buea buer bueu buqa bur- bura burb bure buro burr buru c-bo caaa caab caac caba cabe cabo cabu cac- caca cacc cace caco cacr caec caer caeu caor cara carb carc care caro carr cauc cauo cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cboq cbre ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccu ccee ccob ccoc ccra ccrc ccre ccuc ceac cear ceba cebu cec- ceca cece ceco ceeb ceec ceor ceou ceqa cer- cera cerc cere cero coba cobb cobe cobo cobu coca coce coco cocu coob cor- cora corb corc core coro corr coua coub coue cour crab crac crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creo creu crob croc croe croo cror crub crue cuau cub- cuba cubb cube cuca cucc cuce cucq cuer cura curb cure curo curr eaba eaca eacc eaec eara earb eare earo ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ebru ebur ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecou ecra ecrc ecrr ecru ecua eeca eeea eeee eeoc eera eerc eero eora eore eqao equ- equa eque equo erau erba erbb erbe erca ercc erce ereb erec erer erob eroc eroe eroo erra errc erre erro erua erub eruc erur euba eubc euer eur- eura eurc eure euro o-eo oaau oaer oara oare obba obbo obea obec ober oboe oboq obor obra obre obro ocab ocac ocbc occa occc oce ocee ocra ocre ocro ocrr ocur oec- oeca oecc oeec oera oere ooaa ooba oobe oocr ooer oooo oora oore oque orab orac orae orao orar orba orbb orbe orbo orbu orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orra orro orub ouac oucc ouea ouer our- oura oure ouro ouu- q-be qa-c qabo qara qare qaru qcea qcue qere qero qerq qobu qoca qoob qore qqqq quaa quab quae quar quba qube qubo qucu quee quer quob quoc quor quro quu- raab raba rabb rabe rabo rabu rac- raca racc race raco racq racu raec raer raob raoc rara rarb rare raro raua raub rauc raue rbbb rbbr rcac rcbc rcbo rccb rccc rea- reac reae reao rear reau reba rebb rebe rebo rebu reca recc rece recr recu reeb reou reqa rera rere rero reru reue reuu roab roar rob- roba robb robe robo robu roca rocc roce roco roea roer roob roor rora rorc rore roro roru roua roub roue rrrr ruba rubb rube rubu ruca ruce ruer rura rurc rure ruro ruru uabc uaca uaoc uarc uaru uaua ubac ubar ubba ubbe ubbo uber uboc ubra ucar ucbc ucca ucea ucrc ucua ueba uocc uor- uore uqac uqao uqar uqcc urac urao urau urba urbe urca ure- urea uro- uroa uroo urra urre uruq urur uuoc uuuu