bbbb bbeb bbpr bbrc bcbc bcbp bccc bcec bcer bcor bcpp bcru bcuc bcup bebb bebe bebo becu beeb beep beer beo- beor bepo berc bere bero berr beru beur bobb bobe bobo bobu boce boco bocu boec boee boeo boep boer boob booc booe boop boor bope bopp bor- bore boro borr boru boue boup bour bpcp bpoe bprc brcb brce breb brec bree breo brep brer brob broc broe broo bror brou brrr bruc brue brup bubb bube bubo bubu bucc buce buco bucu buer bueu bupc bur- burb bure buro burp burr buru c-bo cbbc cbcc cbce cbcp cbcr cbcu cbec cbee cber cbpc cbpp cbre ccbc cccb cccc cccp cccu ccee ccob ccoc ccpe ccpp ccpr ccrc ccre ccrp ccuc ccup cebp cebu cec- cece ceco cecp ceeb ceec ceop ceor ceou cepc cepe cepo cepp cepr cer- cerc cere cero cerp cobb cobe cobo cobu coce coco cocp cocu coep coob coop cope copo copp copr cor- corb corc core coro corp corr coub coue coup cour cpbc cpce cpcu cpeb cpep cper cpre crbc crbu crcc crce crcr cre- creb crec cree creo crep creu crob croc croe croo crop cror crpc crub crue crup cub- cubb cube cucc cuce cuer cupe cupo cupp cupr curb cure curo curr ebbc ebbo ebbr ebcc eber eboe eboo ebor ebpo ebro ebru ebur ecbc ecbe eccb eccc ecce ecco eco- ecop ecou ecpp ecrc ecrr ecru eeee eeoc eerc eero eore epcc epec epee eper epoc epor eppc eppo eppp eprb epro eprp epub erbb erbe ercc erce ercp ereb erec erer erob eroc eroe eroo erpe errc erre erro erub eruc erur eubc euer eur- eurc eure euro o-eo obbo obec ober oboe obor obre obro ocbc occc oce ocee ocpp ocre ocro ocrr ocur oec- oecc oeec oere oobe oocr ooer oooo oore opec opep oper opo- opor oppo orbb orbe orbo orbu orce orco ore- oreb orec oreo orer oro- oroe oror orpc orpe orro orub orup oucc ouer oupe our- oure ouro ouu- pbcc pboc pcbc pccc pcce pcep pcer pcoe pcpb pcpp pcrc pcre pece peco pecr peec peep peer peor peou pepe pepo per- perc pere pero perp perr peru peur pobo poce poco poer poop poor pop- popc pope popo popp porb porc pore poro porr poup pour ppcc pper pppo pppp pprc ppru ppur prbc prcc prcp pre- preb prec pree prep preu pro- prob proc proe proo prop prou prue pruu pu-e pube pubu puce pueo puer pueu pupe pupu pur- purb pure puro purp purr puru puuc rbbb rbbr rcbc rcbo rccb rccc rcep rcpo rebb rebe rebo rebu recc rece recp recr recu reeb reep reop reou repe repo repp repr repu rere rero reru reue reup reuu rob- robb robe robo robu rocc roce roco roer roob roop roor rope ropo rorc rore roro roru roub roue roup rpob rpoe rrrr rubb rube rubp rubu ruce ruer rupe rupp rurc rure ruro rurp ruru u-rp ubbe ubbo uber uboc ubpc ucbc uccp ucpb ucrc uocc uor- uore upbe upor uppc uppe uppp uppu upup urbe ure- uro- uroo urpo urre urup urur uucp uuoc uuuu