bbbb bbeb bbpr bbrc bcbc bcbp bccc bcec bcer bcor bcoz bcpp bebb bebe bebo beeb beep beer beo- beor bepo berc bere bero berr beze bobb bobe bobo boce boco boec boee boeo boep boer boob booc booe boop boor booz bope bopp bor- bore boro borr borz bozo bpcp bpoe bprc brcb brce breb brec bree breo brep brer brez brob broc broe broo bror broz brrr bzer bzoe bzzz c-bo cbbc cbcc cbce cbcp cbcr cbec cbee cber cbpc cbpp cbre ccbc cccb cccc cccp ccee ccob ccoc ccpe ccpp ccpr ccrc ccre ccrp cebp cec- cece ceco cecp ceeb ceec ceop ceor cepc cepe cepo cepp cepr cer- cerc cere cero cerp ceze cobb cobe cobo coce coco cocp coep coob coop cope copo copp copr cor- corb corc core coro corp corr coze cozz cpbc cpce cpeb cpep cper cpre crbc crcc crce crcr crcz cre- creb crec cree creo crep crob croc croe croo crop cror croz crpc ebbc ebbo ebbr ebcc eber eboe eboo ebor ebpo ebro ecbc ecbe eccb eccc ecce ecco eco- ecop ecpp ecrc ecrr eeee eeoc eerc eero eeze eore epcc epec epee eper epoc epor eppc eppo eppp eprb epro eprp erbb erbe ercc erce ercp ereb erec erer erez erob eroc eroe eroo erpe errc erre erro ezer ezop ezzo o-eo obbo obec ober oboe obor obre obro ocbc occc oce ocee ocpp ocre ocro ocrr oec- oecc oeec oere oobe oocr ooer oooo oore ooze opec opep oper opo- opor oppo orbb orbe orbo orce orco ore- oreb orec oreo orer oro- oroe oror oroz orpc orpe orro orzo ozee ozer pbcc pboc pcbc pccc pcce pcep pcer pcoe pcpb pcpp pcrc pcre pece peco pecr pecz peec peep peer peor pepe pepo per- perc pere pero perp perr peze pezo pobo poce poco poer poop poor pop- popc pope popo popp porb porc pore poro porr porz poze pozo ppcc pper pppo pppp pprc prbc prcc prcp pre- preb prec pree prep prez pro- prob proc proe proo prop proz rbbb rbbr rcbc rcbo rccb rccc rcep rcpo rebb rebe rebo recc rece recp recr recz reeb reep reop repe repo repp repr rere rero reze rob- robb robe robo rocc roce roco roer roob roop roor rooz rope ropo rorc rore roro roze rozz rpob rpoe rrrr z-ro zber zebe zeep zepo zepp zero zeze zobo zoco zoo- zoop zope zorb zorc zore zoro zozo zrce zrze zzzz