a-ak aaaa aaab aaac aaad aaar aaba aabb aabc aabd aaca aacb aacc aacd aack aacr aacu aada aadc aadu aaka aaku aara aarc aard aaru abaa abab abac abad abag abak abar abau abb- abba abbb abbr abca abcb abcc abcd abcr abda abdu abgd abra abrc abua abud abug abuk acaa acab acac acad acag acar acba acca accc accd accu acda acdb acdc acga acgr ackd acr- acra acrc acrr acu- acur adaa adab adac adad adag adak adar adba adbc adcc adda addc addd addr addu adra adua adub aduk adur agac agad agag agar agau agba agca agcc agda agga aggu agra agua agur akaa akar akca akka akku akr- akra akua arab arac arad arag arak arar arau arba arc- arca arda ardc ardu arga argb arka arr- arra arrc arrg arrk arrr arru arua arub arud arug auaa auca audc auga aur- aura aurd auug baaa baad baak baar baba babb babr babu bac- baca bacc back bada badb badd badr badu baga bagg bak- baka bakr baku bar- bara barb barc bard barg bark barr baru bau- baud baug bauk baur bbad bbau bbbb bbdd bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcda bcra bcru bcuc bd-r bdbc bddc bgca bkgd brab brac brad brag brak brau brca brcb brda brka brkb brrr bruc brud brug buad buar buba bubb bubu buca bucc buck bucu buda budb budd budg budu buga bugg buka bukk buku bur- bura burb burd burg burk burr buru c-cd caaa caab caac caba cabg cabu cac- caca cacc cack cacr cada cadc cadd cadr cadu caga cagg cagr caka cara carb carc card cark carr cauc cauk cbac cbar cbbc cbca cbcc cbcr cbcu cbdb cbdc cbga cbgb cbka cbkg cbkr cbrd ccaa ccab ccac ccad ccag ccar ccba ccbc ccca cccb cccc cccu ccdc ccdr ccga ccgc ccra ccrc ccrg ccuc cd-r cdaa cdac cdad cdba cdda cddb cddr cgac cgcc cgcg ckac ckbc ckck ckdu ckga ckrc ckrd crab crac crag crar crau crbc crbu crca crcc crcr crda crdc crkc crub crud crug cruk cuau cub- cuba cubb cuca cucc cuck cuda cuga cuk- cuka cura curb curd curr daab daad daag daar daau daba dabb dabu daca dada dadu daga dagg dagr dagu daka daku dara darb darc dard darg dark darr daru daub daud dauk daur dbag dbar dbcc dcbc dcca dccb dccc dccu dcdb dcra dcrk dddd ddrc ddub dgac dgca dgka dgkb dgkd dgkg dkba dkdc draa drab drac drad drag drak drar drau drba drbc drca drda drra drua drub drug druk druu duaa duab duad duar dub- duba dubb dubc dubu duca duck duda dudd dudu duga dugu duka duku dura durg durk duru duur gaar gaba gabb gabr gabu gack gada gadd gadk gaga gagg gagu gaku gara garb gard garg garr gaua gaub gaud gauk gaur gbag gc-c gcaa gcbc gccc gcda gcrg gdca gddb gdrc gggg grab grac grad grau grbr grcc grdc grrr grua grub grug grur guaa guac guag guar guba gubb gubu guca guck guda gudu guga gugb gugg gugu gura gurb gurd gurg gurk gurr guru kaaa kaab kaag kaak kaar kaba kabb kabc kabd kabg kabr kabu kacb kacc kacd kacu kad- kada kadd kadr kadu kag- kaga kagb kagc kagg kagr kagu kaka kakc kakk kaku kara karb kard karg kark karr karu kau- kaub kauc kaud kaug kauk kaur kbaa kbab kbac kbad kbak kbar kbba kbbb kbbc kbbd kbbg kbbk kbbr kbbu kbca kbcb kbck kbcr kbcu kbdb kbdg kbdr kbga kbgb kbgg kbgr kbkb kbkg kbkk kbkr kbra kbrb kbrc kbrd kbrg kbrk kbru kbua kbub kbuc kbud kbuk kbur kbuu kcaa kcab kcac kcad kcar kcau kcba kcbc kcbd kcbk kcbr kcbu kcca kccb kccc kccd kcck kccr kccu kcda kcdc kcdd kcdr kcdu kcgc kcgr kckc kckk kckr kcrc kcrg kcrr kcru kcua kcub kcuk kdaa kdab kdac kdad kdag kdak kdar kdbb kdbg kdbr kdca kdcc kdcd kdcr kddb kddc kddd kddg kddk kddr kdka kdkb kdkd kdkk kdkr kdrb kdub kduc kdug kdur kgab kgac kgak kgba kgbb kgbc kgbr kgcb kgcc kgcd kgcr kgdb kgdc kgdd kgga kggg kggr kgra kgrb kgrc kgrd kgrg kgrk kgrr kgua kgud kkaa kkac kkag kkar kkba kkbb kkbd kkbg kkbr kkcb kkcd kkck kkcr kkda kkdc kkdd kkdg kkgb kkgr kkkk kkrb kkrc kkrk kkrr kkua kkuu krab krac krad krag krak krar krba krbb krbd krbg krbk krbr krca krcb krcc krcd krcg krcu krda krdc krdd krdg krdr krdu krka krkc krkd krkk krkr krku krrb krrc krrg krrk krrr krua kruc krug kruk krur kuac kuar kuau kuba kubb kubc kubd kubr kubu kuca kucb kucc kucd kucr kuda kudd kudu kuga kugb kugr kuka kukk kuku kura kurb kurd kurk kurr kuru kuub kuuk kuur kuuu raab raad raag raak raba rabb rabk rabu rac- raca racc rack racu rada radc radd radr radu raga ragg ragu raka rakk raku rara rarb rark raua raub rauc raud rauk rbbb rbbr rcac rcbc rccb rccc rcdc rcga rcgc rcrd rcrg rdac rgba rrad rrrr ruad ruag ruba rubb rubu ruca ruck ruda rudd ruga rugg ruka rukk ruku rura rurc rurd ruru ruud uabc uaca uarc uaru uaua ubac ubar ubba ubra ubud ucad ucak ucar ucbc ucca ucdc ucdd ucka ucrc ucua udaa udad udar udau udbc udca udgb udra uduk ugab ugar ugcc ugcg ugra ugur uguu ukba ukcc ukra ukrc ukur urac urad urau urba urca urda urdu urga urgu urka urra uruk urur uuuu