bbbb bbbs bboy bbrc bbyo bcbc bcbs bccc bccs bcor bcos bcrs bcsc bcss bobb bobo bobs boby boco bocs boob booc boor boos bor- boro borr bors bory bosc boso boss boyo boys brcb brob broc broo bror bros brrr brrs brsb brsr bry- bryo bscs bsos bssc byob byoc byos bysb byso byss bysy c-bo cbbc cbbs cbcc cbcr cbcs cbry cbsc ccbc cccb cccc cccs ccob ccoc ccrc ccrs ccss cobb cobo cobs coby coco coob coos cor- corb corc coro corr cors cory cosc coso coss cosy coyo coyr coys crbc crcc crcr crob croc croo cror croy crss cry- cryb cryo crys cscb cscc csco cscr cscs csob csor csos csrc csrs cssr csys cybb cybc cybo cyc- cycb cycc cycs cyrs cyy- cyyc obbo obby obor obos oboy obro obsr obss ocbc occc ocos ocro ocrr ocrs ocys ooby oocr oooo ooos oory orbb orbo orbs orby orco orcs oro- oror oros oroy orro orrs orry orso orsy orys osby oscc osco osoo osor osos osro ossb osso ossy oyss rbbb rbbr rbbs rbss rcbc rcbo rccb rccc rccs rcos rcsc rcss rcyc rob- robb robo robs roby rocc roco rocs roob roor roos rorc roro rory rosc roso ross rosy roys rrrr rscc rscs rscy rsos ryob rysy s-os sbbs sbcc sbcs sbor sccc sccs sccy scob scoo scor scr- scrc scrs scry scsc scso scsr sobo sobr sobs soco socr socs socy soor soos sooy sorb soro sorr sors sory soso soss soyo soys srbc srby srcc sros ssbr ssby sscc sscs ssoc ssrc ssrs sssb sssc ssss sybo syco sycr syro syrs syry syso syss ybbs ybor ybry yccc ycsb yobo yobs yoro yory yoso yoyo ysby ysco ysyb yyyy