bbbb bbeb bbet bbrc bcbc bccc bcec bcer bcet bcru bctc bcuc bebb bebe beby becu beeb beer beet beey berc bere berr bert beru bery betc bete bett betu beur beye beyt brcb brce breb brec bree brer bret brey brrr brtc bruc brue brut bry- brye btcc btec btrc btrt btry bttb bubb bube bubu bucc buce bucu buer bueu bur- burb bure burr burt buru bury but- bute butt buty buyu byce byer byre byrt byte cbbc cbcc cbce cbcr cbct cbcu cbec cbee cber cbet cbre cbrt cbry cbtc cbyt ccbc cccb cccc cccu ccee ccrc ccre ccrt cctb cctc cctt ccuc ccut cebu cec- cece cect ceeb ceec cer- cerc cere cert cery cet- cete ceyu crbc crbu crcc crce crcr cre- creb crec cree cret creu crrt crtc crub crue crut cry- cryb ctec ctrc cub- cubb cube cuby cucc cuce cuer curb cure curr curt cury cut- cutc cute cutt cuy- cuyr cybb cybc cyc- cycb cycc cyre cyrt cyt- cytb cyte cyy- cyyc ebbc ebbr ebby ebcc eber ebru ebur ecbc ecbe eccb eccc ecce ecct ecrc ecrr ecru ect- ectc eeby eeee eerc eery eetc eete eetu erbb erbe ercc erce ereb erec erer eret errc erre ertu erub eruc erur eryc erye etbc etbr etcc etec etee eter etre ette ettu etty eubc euer eur- eurc eure eurt eury eyeb eyec eyer eyet eyey eyre eyry eyte eyyr rbbb rbbr rcbc rccb rccc rcet rctc rcyc rebb rebe rebu recc rece recr rect recu recy reeb reet rere rert reru rery rete retr rett rety reue reut reuu reye rrrr rtcc rtce rtee rubb rube rubu ruby ruce ruct ruer ruet rurc rure ruru rute rutt rutu ruty rybe ryeb ryet rytt ryue ryyt tbcb tbcc tbce tbrb tcby tccc tccu tctc tebu tecr tect teec teer teet ter- terc tere terr teru tery tete tetr tett tetu teut teye teyr trcc tre- trec tree tret treu trey trtc trte trtr trub truc true trut truu try- tryb trye ttbb tter tttt tubb tube tubr tubu tucc tuer tuet tuey turb turc ture turr turt turu tury tute tutt tutu tuty tuye tyce tyee tyer tyet tyr- tyre tyrr tyte tytt tyty ubbe uber ubet ucbc ucrc ucut urbe urcy ure- uret urey urre urry urte urur urut utby utec uter uttu uuuu uyre yber ybet ybry yccc ycee yctc ye-u yeer yeet yerb yere yerr yert yery yete yett yeue yeye yeyr ytre yubu yuce yuer yure yurt yury yute yutu yuty yuye yuyu yyyy