bbbb bbeb bbrc bcbc bccc bcec bcer bcru bcuc bebb bebe beby beck becu beeb beek beer beey beke berc bere berk berr beru bery beuk beur beye beyk bkcy bkry brcb brce breb brec bree brek brer brey brkb brrr bruc brue bry- brye bryk bubb bube bubu bucc buce buck bucu buer bueu buke bukk buku buky bur- burb bure burk burr buru bury buyu byce byck byer byke byre byrk cbbc cbcc cbce cbcr cbcu cbec cbee cber cbkr cbre cbry ccbc cccb cccc cccu ccee ccrc ccre ccuc cebu cec- cece ceeb ceec ceke cer- cerc cere cery ceyu ckbc ckbe ckck ckcy cker ckey ckrc ckry crbc crbu crcc crce crcr cre- creb crec cree creu crkc crub crue cruk cry- cryb cub- cubb cube cuby cucc cuce cuck cuek cuer cuk- cuke curb cure curr cury cuy- cuyr cybb cybc cyc- cycb cycc cyke cyre cyrk cyy- cyyc ebbc ebbr ebby ebcc eber ebru ebur ecbc ecbe eccb eccc ecce ecky ecrc ecrr ecru eeby eeee eeke eerc eery ekeb ekek eker ekur erbb erbe ercc erce ereb erec erer erke errc erre erub eruc erur eryc erye eubc euer eur- eurc eure eury eyck eyeb eyec eyer eyey eyke eyre eyry eyyr kbbb kbbc kbbe kbbk kbbr kbbu kbcb kbce kbck kbcr kbcu kbcy kbeb kbec kbee kbek kber kbey kbkb kbkk kbkr kbky kbrb kbrc kbre kbrk kbru kbry kbub kbuc kbue kbuk kbur kbuu kbuy kbyb kbyr kbyu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kccy kceb kcec kcee kceu kcey kckc kckk kckr kcky kcrc kcrr kcru kcry kcub kcue kcuk kcye kcyk kcyy kebb kebc kebe kebr kebu keck kecr keek keer kekb kekc keke keku ker- kerb kerc kere kerk kerr keru keur keyb keye keyu keyy kkbb kkbe kkbr kkcb kkck kkcr kkcy kkkk kkrb kkrc kkre kkrk kkrr kkuu kkyc kkyy krbb krbe krbk krbr krcb krcc krce krcu kreb krec kree krek kreu krkc krke krkk krkr krku krky krrb krrc krre krrk krrr krry kruc krue kruk krur krye kryk kryy kubb kubc kube kubr kubu kuby kucb kucc kuce kucr kuek kueu kuke kukk kuku kuky kurb kure kurk kurr kuru kury kuub kuuk kuur kuuu kuyu kuyy kybb kybc kybe kybr kyby kycc kyck kycr kyee kykc kyke kykk kykr kyky kyrc kyre kyrk kyuk kyur kyuu kyyk kyyy rbbb rbbr rcbc rccb rccc rcyc rebb rebe rebk rebu recc rece reck recr recu recy reeb reek reke reky rere reru rery reue reuk reuu reye reyk rrrr rubb rube rubu ruby ruce ruck ruer ruke rukk ruku rurc rure ruru rybe ryck ryeb ryke ryue ryuk ubbe ubek uber ucbc ucky ucrc ukcc ukek ukeu ukky ukrc ukur urbe urcy ure- urey urke urre urry uruk urur uuuu uyre yber ybry yccc ycee ye-u yeck yeek yeer yeke yerb yere yerk yerr yery yeue yeuk yeye yeyr ykey yrke yubu yuce yuck yuer yuke yuku yuky yure yury yuye yuyu yyyy