bbbb bbdd bbeb bbet bbpr bbrc bcbc bcbp bccc bcde bcec bcer bcet bcpp bctc bd-r bdbc bddc bdpc bebb bebe bede beeb beed beep beer beet berc berd bere berr bert betc bete bett bpcp bprc bprd brcb brce brdt breb brec bred bree brep brer bret brex brrr brtc btbp btcc btcx btdt btec btex btrc btrt bttb c-cd cbbc cbcc cbce cbcp cbcr cbct cbdb cbdc cbec cbee cber cbet cbpc cbpp cbrd cbre cbrt cbtc ccbc cccb cccc cccp ccdc ccdp ccdr cced ccee ccpe ccpp ccpr ccrc ccre ccrp ccrt cctb cctc cctt cd-e cd-r cddb cddr cdec cder cdex cdre cebp cec- cece cecp cect cedd cede cedt ceeb ceec cepc cepe cepp cepr cept cer- cerc cerd cere cerp cert cet- cete cetp cexe cpbc cpce cpeb cpep cper cppd cpre cprt cptp cptr crbc crcc crce crcr crdc cre- creb crec cred cree crep cret crex crpc crrt crtc crtp ctcp ctec ctep ctpp ctrc ctrp cxxx dbcc dbcp dbpc dbpd dbtt dcbc dccb dccc dccp dcct dcdb dctc dcxx dddd ddrc ddre debe debt dec- decc decd dece dect dedd dede deeb deed deep deer deet depc depe depp depr dept der- derb derc dere derp derr dete detr dex- dexe dext dpbc dpcp dpdt dper dppc dppx drbc dred dree dret dtcc dtdp dted dttp dttx dtxt dxbc dxbe dxbr dxbt dxcb dxcc dxdc dxdr dxec dxed dxep dxrd dxre dxrp dxrr dxrt dxrx dxxr dxxx ebbc ebbr ebcc ebed eber ecbc ecbe eccb eccc ecce ecct ecdc eced ecpd ecpp ecrc ecrr ect- ectc eddc edde eddp ede- eder edex eede eeee eerc eetc eete eext epcc epec epee eper eppc eppp eprb eprp epte epxp er-x erbb erbe ercc erce ercp erde ereb erec ered erer eret erpe errc erre etbc etbr etcc etec etee eter etre ette exec exed exer expr expt exrx exte extr pbcc pbed pcbc pccc pcce pcep pcer pcpb pcpp pcrc pcrd pcre pcte pdcp pdpr pdrc pdtc pece pecr pect ped- pede peec peed peep peer peet pepd pepe per- perc perd pere perp perr pert pete petr pett ppcc ppcd pper pppd pppp pprc pptt prbc prcc prcd prcp pre- preb prec pred pree prep pret prex prpd prrd prtc prtp prtr ptcc ptdc pter ptpd ptrd pttc rbbb rbbr rcbc rccb rccc rcdc rcde rcep rcet rcpd rcpt rcrd rctc rdbp rder rdpc rebb rebe recc recd rece recp recr rect redc redd rede redr redx reeb reed reep reet repe repp repr rept rerd rere rert retd rete retr rett rexx rpdp rpet rptd rred rrrr rtcc rtce rtdt rtee rtex rttp tbcb tbcc tbcd tbce tbrb tbtp tccc tcdd tcep tctc tddb tecr tect tedd tede tedx teec teed teer teet tepe tepp ter- terc tere terp terr tete tetr tett tetx text tpcd tpcp tped tper tppd tppp tppr tpte tptp tptr trcc tre- trec tred tree tret trex trpc trpe trpp trtc trte trtr ttbb ttcp tter tttt txtr x-ed xbcd xbee xdcc xeer xer- xert xexe xpcc xper xrcd xrdb xrep xtep xxxx