bbbb bbdd bbdo bbeb bbpr bbrc bcbc bcbp bccc bcde bcec bcer bcor bcpp bd-r bdbc bddc bdpc bebb bebe bebo bede bedo beeb beed beep beer beo- beod beor bepo berc berd bere bero berr bobb bobe bobo boce boco bodb bode bodo boec boee boeo boep boer boob booc bood booe boop boor bope bopp bor- bord bore boro borr bpcp bpoe bprc bprd brcb brce brdo breb brec bred bree breo brep brer brob broc brod broe broo bror brrr c-bo c-cd cbbc cbcc cbce cbcp cbcr cbdb cbdc cbdo cbec cbee cber cbpc cbpp cbrd cbre ccbc cccb cccc cccp ccdc ccdp ccdr cced ccee ccob ccoc ccod ccpe ccpp ccpr ccrc ccre ccrp cd-e cd-r cddb cddr cdec cder cdre cebp cec- cece ceco cecp cedd cede cedo ceeb ceec ceop ceor cepc cepe cepo cepp cepr cer- cerc cerd cere cero cerp cobb cobe cobo coce coco cocp codd code coed coep coob cood coop copd cope copo copp copr cor- corb corc cord core coro corp corr cpbc cpce cpeb cpep cper cppd cpre crbc crcc crce crcr crdc cre- creb crec cred cree creo crep crob croc crod croe croo crop cror crpc d-bo dbcc dbcp dbpc dbpd dcbc dccb dccc dccp dcdb dcop dcpo dddd ddoc ddpo ddrc ddre debe dec- decc decd dece deco dedd dede dedo deeb deed deep deer deop deor depc depe depo depp depr der- derb derc dere dero derp derr dobb dobe doce doco dod- dodd dode dodo doer doob dood doop door dope dopo dopp dopr dorc dord dore doro dorp dorr dpbc dpcp dper dppc drbc dred dree drob drod drop ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebpo ebro ecbc ecbe eccb eccc ecce ecco ecdc eced eco- ecod ecop ecpd ecpp ecrc ecrr eddc edde eddo eddp ede- eder edoc edod eede eeee eeoc eerc eero eocd eode eore epcc epec epee eper epoc epod epor eppc eppo eppp eprb epro eprp erbb erbe ercc erce ercp erde ereb erec ered erer erob eroc erod eroe eroo erpe errc erre erro o-eo obbo obec obed ober oboe obor obre obro ocbc occc oce oced ocee ocpd ocpp ocre ocro ocrr odbo oddd oded odeo oder odoo odop odor odrp oec- oecc oedo oeec oere oobe oocr ooer oooo oord oore opec oped opep oper opo- opor oppo orbb orbe orbo orce orco orde ordo ore- oreb orec ored oreo orer oro- oroe oror orpc orpe orro pbcc pbed pboc pcbc pccc pcce pcep pcer pcod pcoe pcpb pcpp pcrc pcrd pcre pdcp pdoc pdpr pdrc pece peco pecr ped- pede pedo peec peed peep peer peor pepd pepe pepo per- perc perd pere pero perp perr pobo pocd poce poco pod- podd pode podo poed poer pood poop poor pop- popc pope popo popp porb porc pore poro porr ppcc ppcd pper ppod pppd pppo pppp pprc prbc prcc prcd prcp pre- preb prec pred pree prep pro- prob proc prod proe proo prop prpd prrd rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcep rcpd rcpo rcrd rdbp rder rdoc rdpc rebb rebe rebo recc recd rece recp recr redc redd rede redo redr reeb reed reep reod reop repe repo repp repr rerd rere rero rob- robb robe robo rocc roce roco rodd rode rodo roed roer roob rood roop roor rope ropo rorc rore roro rpdp rpob rpoe rred rrrr