a-be aaaa aaab aaac aaae aaar aaba aabb aabc aaca aacb aacc aace aaco aacr aacu aaea aaec aage aaoe aaoo aara aarc aare aaro aaru abaa abab abac abae abag 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 abug acaa acab acac acae acag acar acba acca accc acce acco accu ace- acea acec acer acga acgr acoa acoe acog acor acou acr- acra acrc acre acro acrr acu- acue acuo acur aeac aecb aeer aega aer- aera aerc aero ag-o agac agag agao agar agau agba agbo agca agcc agce agco agea agee ager agga agge aggu agob agog agoo agou agra agre agro agua ague agur aoba aoca aoce aoeu aora aorb arab arac arae arag arar arau arba arbe arc- arca arce arco area arec aree areg areo areu arga argb arge argo aroa arob aroe aroo aror arr- arra arrc arre arrg arro arrr arru arua arub arue arug auaa aube auca auce auer auga auge aur- aura aure auro auug baaa baar baba babb babe babo babr babu bac- baca bacc bace baco baer baga bage bagg bago bar- bara barb barc bare barg baro barr baru bau- baug baur bbau bbbb bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bcor bcra bcru bcuc beag bear beau beba bebb bebe bebo beca becu beeb beeg beer bega begg bego begu beo- beor bera berc bere berg bero berr beru beur bgca boab boac boag boar boba bobb bobe bobo bobu boca boce boco bocu boea boec boee boeo boer boga boge bogg bogo boob booc booe boog boor bor- bora bore borg boro borr boru boua boue bour brab brac brae brag brao brau brca brcb brce brea breb brec bree breg breo brer broa brob broc broe brog broo bror brou brrr bruc brue brug buar buba bubb bube bubo bubu buca bucc buce buco bucu buea buer bueu buga buge bugg bugo bur- bura burb bure burg buro burr buru c-bo caaa caab caac caba cabe cabg cabo cabu cac- caca cacc cace caco cacr caec caer caeu caga cage cagg cago cagr caor cara carb carc care caro carr cauc cauo cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cbga cbgb cbre ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccu ccee ccga ccgc ccob ccoc ccra ccrc ccre ccrg ccuc ceac cear ceba cebu cec- ceca cece ceco ceeb ceec cege cego ceor ceou cer- cera cerc cere cero cgac cgcc cgcg cger cgro coag coba cobb cobe cobo cobu coca coce coco cocu cogo coob cor- cora corb corc core corg coro corr coua coub coue cour crab crac crag crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creg creo creu crob croc croe croo cror crub crue crug cuau cub- cuba cubb cube cuca cucc cuce cuer cuga cura curb cure curo curr eaba eaca eacc eaec eaga eage 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- ecog ecou ecra ecrc ecrr ecru ecua eeca eeea eeee eega eeoc eera eerc eerg eero egaa egae egao egar egba egbe egbu egcc egcg egcr egea egec egee eger eggb egge eggo ego- egor egra egre eora eore erau erba erbb erbe erca ercc erce ereb erec erer erg- erga ergg ergo erob eroc eroe eroo erra errc erre erro erua erub eruc erur euba eubc euer euge eur- eura eurc eure euro gaar gaba gabb gabe gabo gabr gabu gace gaea gaec gaer gaga gage gagg gago gagu gara garb gare garg garo garr gaua gaub gaue gaur gbag gbbo gc-c gcaa gcbc gccc gcoa gcrg geab gear geba gebe geca gece geer gege gegg gego geo- geog gera gerb gere gero geru geue gggg goar goba gobe gobo goca goce gocr goer goga gogo goog goor gora gorb gore gorg goro gorr gou- goug gour grab grac grae grau grbr grcc grce grea greb grec gree greg greu grob groc grog groo gror grou grrr grua grub grue grug grur guaa guac guag guao guar guba gubb gubu guca guer guga gugb guge gugg gugu gura gurb gure gurg guro gurr guru o-eo oaau oaer oara oare obba obbo obea obec ober oboe obor obra obre obro ocab ocac ocbc occa occc oce ocee ocga ocra ocre ocro ocrr ocur oec- oeca oecc oeec oegb oera oere ogae ogar ogb ogba ogbe ogea ogee oger ogge ogoa ogog ogou ogra ogre ogro ooaa ooba oobe oocr ooer oooo oora oore orab orac orae orao orar orba orbb orbe orbo orbu orca orce orco ore- orea oreb orec oreg oreo orer orga orge orgo oro- oroe oror orra orro orub ouac oucc ouea ouer ouge our- oura oure ouro ouu- raab raag raba rabb rabe rabo rabu rac- raca racc race raco racu raec raeg raer raga rage ragg rago ragu raob raoc rara rarb rare raro raua raub rauc raue rbbb rbbr rcac rcbc rcbo rccb rccc rcga rcgc rcrg rea- reac reae reao rear reau reba rebb rebe rebo rebu reca recc rece recr recu reeb rega rege rego regr regu reog reou rera rere rerg rero reru reue reuu rgba rgbe roab roag roar rob- roba robb robe robo robu roca rocc roce roco roea roeg roer roga roge rogg rogo roob roog roor rora rorc rore roro roru roua roub roue rrrr ruag ruba rubb rube rubu ruca ruce ruer ruga ruge rugg 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 ugab ugao ugar ugcc ugcg ugeo uggo ugra ugro ugur uguu uocc uor- uore urac urao urau urba urbe urca ure- urea urga