bbbb bbci bbeb bbpr bbrc bcbc bcbp bccc bcci bcec bcer bcie bcor bcpp bebb bebe bebi bebo beci beeb beep beer beic beir beo- beor bepo berc bere beri bero berr bibb bibe bibi bibo bicc bice bici bico bieb bier bio- bioc bioi bipp birb bire biri biro birr bobb bobe bobi bobo boce boco boec boee boeo boep boer boi- boie boii boob booc booe boop boor bope bopp bor- bore bori boro borr bpcp bpoe bprc brcb brce breb brec bree brei breo brep brer bric brie brio brob broc broe broo bror brrr c-bo cbbc cbcc cbce cbcp cbcr cbec cbee cber cbir cbpc cbpp cbre ccbc cccb cccc ccci cccp ccee ccic ccii ccip ccir ccob ccoc ccpe ccpp ccpr ccrc ccre ccri ccrp cebp cec- cece ceci ceco cecp ceeb ceec ceip ceop ceor cepc cepe cepo cepp cepr cer- cerc cere ceri cero cerp cibc cibe cibi cibo cicc cici cico cicr ciee cier ciii ciob cior cipo cipp cirb circ cire ciri ciro cirr cobb cobe cobi cobo coce coco cocp coep coip coir coob coop cope copi copo copp copr cor- corb corc core cori coro corp corr cpbc cpce cpeb cpep cper cpic cpio cpre cpri crbc crcc crce crcr cre- creb crec cree crei creo crep crib cric crie crip crob croc croe croo crop cror crpc ebbc ebbo ebbr ebcc eber ebic eboe eboo ebor ebpo ebro ecbc ecbe eccb eccc ecce ecci ecco ecib ecip eco- ecop ecpp ecrc ecri ecrr eeee eeoc eerc eero eico eiec eiei eier eipo eipr eire eoir eore eori epcc epci epec epee eper epi- epic epie epip epoc epor eppc eppo eppp eprb epro eprp erbb erbe ercc erce ercp ereb erec erei erer eric erie erio erob eroc eroe eroi eroo erpe errc erre erro i-be ibec ibie ibrc ibri ibro icbc icbp iccb iccc icci icco iccp iccr icec icee icer icoc icor icpc icpo icrc icre icrr iecc ieie ieio iere ieri iiie iiii iiio iioi iioo iiop iirc iobi ioci iocp ioee ioii ioio iooi iooo iore iori ipcc ipce ipec iper ipie ipoe ipop ippc ippo ippr ipri irbe irbp ircc iree irer iri- iric irie irio irip irob iroc irop irpc irpe irrc irre irri o-eo obbo obec ober obie oboe oboi obor obre obri obro ocbc occc occi oce ocee ocpp ocre ocro ocrr oec- oecc oeec oere oici oier oiii oipc oire oobe oobi oocr ooer oooo oore opec opei opep oper opic opie opii opio opo- opor oppi oppo orbb orbe orbi orbo orce orci orco ore- oreb orec oreo orer ori- oric orie orio oro- oroe oror orpc orpe orpi orri orro pbcc pboc pcbc pccc pcce pcep pcer pcip pcoe pcpb pcpp pcrc pcre pece peci peco pecr peec peep peer peio peip peir peor pepe pepi pepo per- perc pere peri pero perp perr pibb pibi picc pice pici pico picr piep pier piip piob pipe pipi pipo pipp pirc pire piri piro pirr pobo poce poco poer poio poop poor pop- popc pope popi popo popp porb porc pore pori poro porr ppcc ppci pper ppib ppic ppie pppo pppp pprc prbc prcc prcp pre- preb prec pree prep pri- prie prii pro- prob proc proe proo prop prri rbbb rbbr rcbc rcbo rccb rccc rcep rcic rcpi rcpo rebb rebe rebo recc rece reci recp recr reeb reep reii reir reop repe repi repo repp repr rere reri rero rib- ribe ribo ricc rice rico riep rier ripe ripi ripp ripr rire riri rob- robb robe robi robo rocc roce roco roer roio roir roob rooi roop roor rope ropo rorc rore rori roro rpii rpob rpoe rrrr