bbbb bbci bboy bbpr bbrc bbyo bcbc bcbp bccc bcci bcor bcpp bibb bibi bibo bicc bici bico bio- bioc bioi bipp birb biri biro birr biry bobb bobi bobo boby boco boi- boii boob booc boop boor bopp bor- bori boro borr bory boyi boyo bpcp bprc brcb bric brio brob broc broo bror brrr bry- bryo byob byoc byoi byop c-bo cbbc cbcc cbcp cbcr cbir cbpc cbpp cbry ccbc cccb cccc ccci cccp ccic ccii ccip ccir ccob ccoc ccpp ccpr ccrc ccri ccrp cibc cibi cibo cicc cici cico cicr ciii ciob cior cipo cipp cirb circ ciri ciro cirr cobb cobi cobo coby coco cocp coip coir coob coop copi copo copp copr copy cor- corb corc cori coro corp corr cory coyo coyr cpbc cpic cpio cpri crbc crcc crcr crib cric crip crob croc croo crop cror croy crpc cry- cryb cryo cybb cybc cybi cybo cyc- cycb cycc cypc cyy- cyyc i-by ibrc ibri ibro ibyi icbc icbp iccb iccc icci icco iccp iccr icoc icor icpc icpo icrc icrr icry iiii iiio iioi iioo iiop iirc iobi ioby ioci iocp ioii ioio iooi iooo iori ipcc ipop ippc ippo ippr ippy ipri irbp irby ircc iri- iric irio irip iriy irob iroc irop irpc irrc irri obbo obby oboi obor oboy obri obro ocbc occc occi ocpp ocro ocrr oici oiii oipc oiry oobi ooby oocr oooo oory opic opii opio opo- opor oppi oppo oppy opry orbb orbi orbo orby orci orco ori- oric orio oro- oror oroy orpc orpi orri orro orry oyri pbcc pboc pcbc pccc pcip pcpb pcpp pcrc pibb pibi picc pici pico picr picy piip piob pipi pipo pipp pipy pirc piri piro pirr piry piyo pobo poco poio poop poor pop- popc popi popo popp popy porb porc pori poro porr pory poyo poyr ppcc ppci ppib ppic pppo pppp pprc prbc prcc prcp pri- prii pro- prob proc proo prop prri pyic pyo- pypy pyr- pyri pyro pyry rbbb rbbr rcbc rcbo rccb rccc rcic rcpi rcpo rcyc rib- ribo riby ricc rico ripi ripp ripr riri riyo rob- robb robi robo roby rocc roco roio roir roob rooi roop roor ropo ropy rorc rori roro rory rpii rpob rpyc rrrr rybp ryip ryob ybor ybry yccc yirb yirr yobi yobo yoop yopo yopy yori yoro yory yoyo ypcc ypir yyyy