bbbb bbdd bbeb bbet bcbc bccc bcde bcec bcet bctc bcuc bdbc bddc bebb bebe beck becu bede bedu beeb beed beek beet beke betc bete bett betu beuk btcc btdt btec btek bttb bubb bube bubu bucc buce buck bucu budb budd bude budu bueu buke bukk buku but- bute butt c-cd cbbc cbcc cbce cbct cbcu cbdb cbdc cbec cbee cbet cbtc ccbc cccb cccc cccu ccdc cced ccee cctb cctc cctt ccuc ccut cd-e cddb cdec cebu cec- cece cect cedd cede cedt cedu ceeb ceec ceke cet- cete ckbc ckbe ckck ckdu cktb ctec cub- cubb cube cucc cuce cuck cude cued cuek cuk- cuke cut- cutc cute cutt dbcc dbtt dcbc dccb dccc dcct dccu dcdb dctc dddd ddub debe debt debu dec- decc decd dece deck dect dedd dede dedu deeb deed deek deet dek- deke dete detk deue deuk deut dkdc dtcc dted dtek dub- dubb dubc dube dubu duce duck duct dudd dude dudu duet duke dukt duku dute duut ebbc ebcc ebed ecbc ecbe eccb eccc ecce ecct ecdc eced ect- ectc eddc edde ede- educ eede eedu eeee eeke eetc eete eetu ekeb eked ekek eket etbc etcc etec etee ette ettu eubc eucd eude kbbb kbbc kbbd kbbe kbbk kbbt kbbu kbcb kbce kbck kbct kbcu kbdb kbde kbeb kbec kbed kbee kbek kbet kbkb kbkk kbtb kbtc kbte kbtk kbtt kbub kbuc kbud kbue kbuk kbut kbuu kcbc kcbd kcbk kcbu kccb kccc kccd kcck kcct kccu kcdc kcdd kcdu kceb kcec kced kcee kcet kceu kckc kckk kctb kctc kcte kctu kcub kcue kcuk kdbb kdcc kdcd kdce kddb kddc kddd kddk kdeb kdec kdet kdkb kdkd kdkk kdkt kdtd kdub kduc kdut kebb kebc kebe kebt kebu keck kedb kedc kedd kede kedt keed keek keet kekb kekc keke keku ket- ketc ketd kete ketk kett ketu kkbb kkbd kkbe kkbt kkcb kkcd kkck kkct kkdc kkdd kkdt kked kkkk kktc kktk kktu kkut kkuu ktbb ktbc ktbt ktbu ktcc ktce ktck ktdb ktdc ktdd ktde ktdk ktec kted ktee ktek ktkb ktkc ktke ktkk ktkt ktku kttc kttk kttt kttu ktub ktuc kubb kubc kubd kube kubu kucb kucc kucd kuce kudd kude kudu kued kuek kueu kuke kukk kuku kute kutt kutu kuub kuuk kuuu tbcb tbcc tbcd tbce tccc tccu tcdd tctc tddb tebu teck tect tedd tede tedk teec teed teek teet teke tete tett tetu teuk teut ttbb tttt tubb tube tubu tucc tuck tude tudu tuet tuke tute tutt tutu ubbe ubek ubet ubud ucbc ucdc ucdd ucut udbc udet uduk ukcc ukek ukeu utec uttu uuuu