bbbb bbci bbpr bbrc bcbc bcbp bccc bcci bcor bcpp bibb bibi bibo bicc bici bico bio- bioc bioi bipp birb biri biro birr bobb bobi bobo boco boi- boii boob booc boop boor bopp bor- bori boro borr bpcp bprc brcb bric brio brob broc broo bror brrr c-bo cbbc cbcc cbcp cbcr cbir cbpc cbpp 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 coco cocp coip coir coob coop copi copo copp copr cor- corb corc cori coro corp corr cpbc cpic cpio cpri crbc crcc crcr crib cric crip crob croc croo crop cror crpc ibrc ibri ibro icbc icbp iccb iccc icci icco iccp iccr icoc icor icpc icpo icrc icrr iiii iiio iioi iioo iiop iirc iobi ioci iocp ioii ioio iooi iooo iori ipcc ipop ippc ippo ippr ipri irbp ircc iri- iric irio irip irob iroc irop irpc irrc irri obbo oboi obor obri obro ocbc occc occi ocpp ocro ocrr oici oiii oipc oobi oocr oooo opic opii opio opo- opor oppi oppo orbb orbi orbo orci orco ori- oric orio oro- oror orpc orpi orri orro pbcc pboc pcbc pccc pcip pcpb pcpp pcrc pibb pibi picc pici pico picr piip piob pipi pipo pipp pirc piri piro pirr pobo poco poio poop poor pop- popc popi popo popp porb porc pori poro porr ppcc ppci ppib ppic pppo pppp pprc prbc prcc prcp pri- prii pro- prob proc proo prop prri rbbb rbbr rcbc rcbo rccb rccc rcic rcpi rcpo rib- ribo ricc rico ripi ripp ripr riri rob- robb robi robo rocc roco roio roir roob rooi roop roor ropo rorc rori roro rpii rpob rrrr