bbbb bbci bbeb bbet bbrc bcbc bccc bcci bcec bcer bcet bcie bcit bcru bctc bcuc bebb bebe bebi beci beck becu beeb beek beer beet beic beik beir beit beke beki berc bere beri berk berr bert beru betc bete beti bett betu beuk beur bibb bibe bibi bicc bice bici bick bieb bier biet bieu bike biku birb bire biri birk birr birt biru bitc bite bitt bitu brcb brce breb brec bree brei brek brer bret bric brie brik brit brkb brrr brtc bruc brue brut btcc btec btek btie btrc btrt bttb bubb bube bubi bubu bucc buce buci buck bucu buer bueu buic buie buik buir buit buiu buke buki bukk buku bur- burb bure buri burk burr burt buru but- bute buti butt cbbc cbcc cbce cbcr cbct cbcu cbec cbee cber cbet cbir cbit cbkr cbre cbrt cbtc ccbc cccb cccc ccci cccu ccee ccic ccii ccir ccrc ccre ccri ccrt cctb cctc cctt ccuc ccut cebu cec- cece ceci cect ceeb ceec ceke cer- cerc cere ceri cert cet- cete ceti ceui cibc cibe cibi cicc cici cicr cict cicu ciee cier ciii ciit cikr cirb circ cire ciri cirk cirr cirt citb cite citi citt citu ciuc ckbc ckbe ckbi ckck cker ckrc cktb crbc crbu crcc crce crcr cre- creb crec cree crei cret creu crib cric crie crik crit criu crkc crrt crtc crub crue cruk crut ctbi ctec ctic ctrc cub- cubb cube cubi cucc cuce cuci cuck cuek cuer cui- cuir cuit cuk- cuke curb cure curi curr curt cut- cutc cute cutt ebbc ebbr ebcc eber ebic ebit ebru ebur ecbc ecbe eccb eccc ecce ecci ecct ecib ecit ecrc ecri ecrr ecru ect- ectc eeee eeke eerc eetc eete eetu eick eiec eiei eier eike eiki eire eitb eitc eiti eitr ekeb ekek eker eket ekki ekur erbb erbe ercc erce ereb erec erei erer eret eric erie erik erit eriu erke erki errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etic etik etre ette etti ettu etui eubc eubi euer eur- eurc eure eurt i-be ibec ibet ibie ibrc ibri ibtb ibtc icbc iccb iccc icci iccr icct iccu icec icee icer icet icke icrc icre icrr icrt icru icub icue iecc ieet ieie iere ieri iett iiie iiii iiit iirc iitr iitt iiuc ikee iker ikki ikri ikue irbe ircc ircu iree irer iri- iric irie irki irrc irre irri irte irti itbe itec itek iter itet itic itie itri itur iucc iuce iuiu k-ci kbbb kbbc kbbe kbbi kbbk kbbr kbbt kbbu kbcb kbce kbci kbck kbcr kbct kbcu kbeb kbec kbee kbek kber kbet kbib kbic kbie kbik kbit kbiu kbkb kbkk kbkr kbrb kbrc kbre kbri kbrk kbrt kbru kbtb kbtc kbte kbtk kbtr kbtt kbub kbuc kbue kbuk kbur kbut kbuu kcbc kcbi kcbk kcbr kcbu kccb kccc kcci kcck kccr kcct kccu kceb kcec kcee kcei kcet kceu kcic kcie kcii kcir kcit kciu kckc kckk kckr kcrc kcri kcrr kcrt kcru kctb kctc kcte kcti kctu kcub kcue kcui kcuk kebb kebc kebe kebi kebr kebt kebu keck kecr keek keer keet keib keii keik keir kekb kekc keke keki keku ker- kerb kerc kere keri kerk kerr kert keru ket- ketc kete keti ketk ketr kett ketu keur kibb kibc kibe kibi kibr kibt kibu kicb kicc kice kick kicr kict kier kieu kiic kiii kiik kiit kiiu kikc kiki kikk kikr kikt kiku kirb kirc kiri kirk kirr kirt kiru kitc kite kiti kitr kitt kitu kiur kiuu kkbb kkbe kkbi kkbr kkbt kkcb kkci kkck kkcr kkct kkic kkik kkit kkkk kkrb kkrc kkre kkrk kkrr kkrt kktc kktk kktu kkut kkuu krbb krbe krbi krbk krbr krbt krcb krcc krce krci krcu kreb krec kree krei krek kret kreu krib krik krit krkc krke krki krkk krkr krku krrb krrc krre krri krrk krrr krrt krtc krti krtk krtr kruc krue krui kruk krur ktbb ktbc ktbr ktbt ktbu ktcc ktce ktck ktcr ktec ktee ktek ktib ktic ktie ktik ktkb ktkc ktke ktkk ktkr ktkt ktku ktrb ktrc ktre ktri ktrk ktrr ktrt ktru kttc ktti kttk kttr kttt kttu ktub ktuc ktui kubb kubc kube kubr kubu kucb kucc kuce kuci kucr kuei kuek kueu kuic kuie kuik kuke kuki kukk kuku kurb kure kuri kurk kurr kurt kuru kute kuti kutr kutt kutu kuub kuuk kuur kuuu rbbb rbbr rcbc rccb rccc rcet rcic rctc rcti rebb rebe rebk rebu recc rece reci reck recr rect recu reeb reek reet reii reik reir reit reiu reke reki rekt rere reri rert reru rete reti retr rett reue reuk reut reuu rib- ribe ribu ricc rice rick rict riek rier riet rieu rike riki rikk riku rire riri rite riti ritt ritu riue rrrr rtcc rtce rtee rtei rubb rube rubi rubu ruce ruci ruck ruct ruer ruet ruit ruke ruki rukk ruku rurc rure ruri ruru rute ruti rutt rutu tbcb tbcc tbce tbit tbrb tccc tccu tctc tebu teck tecr tect teec teek teer teet teic teie teir teiu teke ter- terc tere teri terk terr teru tete teti tetr tett tetu teuk teut tibi tibu ticc tice tick tie- tiee tiei tier tiet tiit tiiu tike tiki tiku tirb tire tiri tirr tiru titc tite titi titt titu trcc tre- trec tree trei trek tret treu tri- trib tric trie trik trit trtc trte trtr trub truc true truk trut truu ttbb tter tttt tubb tube tubr tubu tucc tuck tuei tuer tuet tuik tuit tuiu tuke turb turc ture turi turk turr turt turu tute tuti tutt tutu u-ie ubbe ubbi ubek uber ubet ubic ubii ubik ubir ubit ucbc ucci ucrc ucut ueir ueki uirr ukcc ukek ukeu ukrc ukur urbe urbi urci ure- uret urib uric urie urik uriu urke urre urri urte uruk urur urut utec uter utik utri utti uttu uuri uuuu