bbbb bbch bboy bbrc bbyo bcbc bccc bcor bhcc bhor bhoy bobb bobo boby boch boco boho bohr bohy boob booc booh boor bor- borh boro borr bory boyo brcb brob broc broh broo bror brrr bry- bryo bych byob byoc c-bo cbbc cbcc cbcr cbrh cbry ccbc cccb cccc cchr cchy ccob ccoc ccrc chch choc choh choo chor choy chrb chrc chro chrr chy- chyc cobb cobh cobo coby coch coco coho coob cooh cor- corb corc coro corr cory coyo coyr crbc crcc crcr crob croc croh croo cror croy cry- cryb cryo cybb cybc cybo cyc- cycb cycc cyy- cyyc hboc hcbc hccb hccc hcch hhhh hobo hoby hoch hocr hoho hoor horc horo horr hory hrob hrrc hryb hybo hyo- obbo obby obor oboy obrh obro ocbc occc ocro ocrr ohcc ohho ohob ohoh ohyo ooby oocr ooho oooh oooo oory orbb orbo orby orch orco oro- oror oroy orro orry oych rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcyc rhob rhoc rhoh rob- robb robo roby rocc roch roco rohr rohy roob roor rorc roro rory rrrr rych ryhb ryob ryoh ybor ybry yccc ycch yobo yoch yoho yoro yory yoyo yrho yyyy