bbbb bboy bbrc bbyo bcbc bccc bcor bnoc bnor bnrr bobb bobo boby boco bonc bonn bono bony boob booc boon boor bor- born boro borr bory boyn boyo brcb brno brob broc bron broo bror brrr bry- bryn bryo bync byno byob byoc byon byrn c-bo cbbc cbcc cbcn cbcr cbrn cbry ccbc ccbn cccb cccc ccnb ccnc ccnr ccny ccob ccoc ccrc cnbc cnco cnrc cnrr cobb cobo coby coco con- conc conn cono cony coob coon cor- corb corc corn coro corr cory coyn coyo coyr crbc crcc crcr crob croc cron croo cror croy cry- cryb cryn cryo cybb cybc cybo cyc- cycb cycc cyn- cyno cyon cyy- cyyc cyyn nbbc nbbo nbcc nbco nboy ncbc nccc nccn nccr ncnc ncoc ncor ncrc nnnn nobc nobo noco non- nonn nono noo- noob noon nooo noor nor- norb norc norn noro norr nory noyo nroc nron nrrc nycc nyco nycy nyny nyon nyrb nyro obbo obby obon obor oboy obro ocbc occc occn ocon ocro ocrr onby onc- onco onno onon onor onoy ooby oocr oooo oory orbb orbo orby orco ornc orno orny oro- oron oror oroy orro orry oyon rbbb rbbr rcbc rcbo rccb rccc rcnr rcon rcyc rnbr rnco rob- robb robo roby rocc roco ronc rono rony roob roon roor rorc roro rory royn rrrr rynn ryob ryon ybor ybry yccc ynon yobo yono yoon yorn yoro yory yoyn yoyo yron yryn yyyy