bbbb bbdd bbeb bbet bbrc bcbc bccc bcde bcec bcer bcet bcru bctc bcuc bd-r bdbc bddc bebb bebe beck becu bede bedu beeb beed beek beer beet beke berc berd bere berk berr bert beru betc bete bett betu beuk beur brcb brce brdt breb brec bred bree brek brer bret brkb brrr brtc bruc brud brue brut btcc btdt btec btek btrc btrt bttb bubb bube bubu bucc buce buck bucu budb budd bude budu buer bueu buke bukk buku bur- burb burd bure burk burr burt buru but- bute butt c-cd cbbc cbcc cbce cbcr cbct cbcu cbdb cbdc cbec cbee cber cbet cbkr cbrd cbre cbrt cbtc ccbc cccb cccc cccu ccdc ccdr cced ccee ccrc ccre ccrt cctb cctc cctt ccuc ccut cd-e cd-r cddb cddr cdec cder cdre cebu cec- cece cect cedd cede cedt cedu ceeb ceec ceke cer- cerc cerd cere cert cet- cete ckbc ckbe ckck ckdu cker ckrc ckrd cktb crbc crbu crcc crce crcr crdc cre- creb crec cred cree cret creu crkc crrt crtc crub crud crue cruk crut ctec ctrc cub- cubb cube cucc cuce cuck cude cued cuek cuer cuk- cuke curb curd cure curr curt cut- cutc cute cutt dbcc dbtt dcbc dccb dccc dcct dccu dcdb dcrk dctc dddd ddrc ddre ddub debe debt debu dec- decc decd dece deck dect dedd dede dedu deeb deed deek deer deet dek- deke der- derb derc dere derk derr dete detk detr deue deuk deur deut dkdc drbc dred dree drek dret drub drue druk drut druu dtcc dted dtek dub- dubb dubc dube dubu duce duck duct dudd dude dudu duer duet duke dukt duku dure durk durt duru dute duur duut ebbc ebbr ebcc ebed eber ebru ebur ecbc ecbe eccb eccc ecce ecct ecdc eced ecrc ecrr ecru ect- ectc eddc edde ede- eder edru educ edur eede eedu eeee eeke eerc eetc eete eetu ekeb eked ekek eker eket ekur erbb erbe ercc erce erde ereb erec ered erer eret erke errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etre ette ettu eubc eucd eude euer eur- eurc eure eurt kbbb kbbc kbbd kbbe kbbk kbbr kbbt kbbu kbcb kbce kbck kbcr kbct kbcu kbdb kbde kbdr kbeb kbec kbed kbee kbek kber kbet kbkb kbkk kbkr kbrb kbrc kbrd kbre kbrk kbrt kbru kbtb kbtc kbte kbtk kbtr kbtt kbub kbuc kbud kbue kbuk kbur kbut kbuu kcbc kcbd kcbk kcbr kcbu kccb kccc kccd kcck kccr kcct kccu kcdc kcdd kcdr kcdu kceb kcec kced kcee kcet kceu kckc kckk kckr kcrc kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuk kdbb kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddk kddr kdeb kdec kdet kdkb kdkd kdkk kdkr kdkt kdrb kdtd kdtr kdub kduc kdur kdut kebb kebc kebe kebr kebt kebu keck kecr kedb kedc kedd kede kedr kedt keed keek keer keet kekb kekc keke keku ker- kerb kerc kere kerk kerr kert keru ket- ketc ketd kete ketk ketr kett ketu keur kkbb kkbd kkbe kkbr kkbt kkcb kkcd kkck kkcr kkct kkdc kkdd kkdt kked kkkk kkrb kkrc kkre kkrk kkrr kkrt kktc kktk kktu kkut kkuu krbb krbd krbe krbk krbr krbt krcb krcc krcd krce krcu krdc krdd krde krdr krdu kreb krec kred kree krek kret kreu krkc krkd krke krkk krkr krku krrb krrc krre krrk krrr krrt krtc krtk krtr kruc krue kruk krur ktbb ktbc ktbr ktbt ktbu ktcc ktce ktck ktcr ktdb ktdc ktdd ktde ktdk ktdr ktec kted ktee ktek ktkb ktkc ktke ktkk ktkr ktkt ktku ktrb ktrc ktre ktrk ktrr ktrt ktru kttc kttk kttr kttt kttu ktub ktuc kubb kubc kubd kube kubr kubu kucb kucc kucd kuce kucr kudd kude kudu kued kuek kueu kuke kukk kuku kurb kurd kure kurk kurr kurt kuru kute kutr kutt kutu kuub kuuk kuur kuuu rbbb rbbr rcbc rccb rccc rcdc rcde rcet rcrd rctc rder rebb rebe rebk rebu recc recd rece reck recr rect recu redc redd rede redr redu reeb reed reek reet reke rekt rerd rere rert reru retd rete retr rett reue reuk reut reuu rred rrrr rtcc rtce rtdt rtee rubb rube rubu ruce ruck ruct rudd rude rued ruer ruet ruke rukk ruku rurc rurd rure ruru rute rutt rutu ruud tbcb tbcc tbcd tbce tbrb tccc tccu tcdd tctc tddb tdkr tebu teck tecr tect tedd tede tedk teec teed teek teer teet teke ter- terc tere terk terr teru tete tetr tett tetu teuk teut trcc tre- trec tred tree trek tret treu trtc trte trtr trub truc trud true truk trut truu ttbb tter tttt tubb tube tubr tubu tucc tuck tude tudu tuer tuet tuke turb turc turd ture turk turr turt turu tute tutt tutu ubbe ubek uber ubet ubud ucbc ucdc ucdd ucrc ucut udbc uder udet uduk ukcc ukek ukeu ukrc ukur urbe urde urdu ure- ured uret urke urre urte uruk urur urut utec uter uttu uuuu