bbbb bbbs bboy bbyo bcbc bcbs bccc bccs bcos bcsc bcss bkcy bobb bobo bobs boby bock boco bocs boko boks boob booc book boos bosc bosk boso boss boyo boys bscs bsos bssc byck byob byoc byos bysb byso byss bysy c-bo cbbc cbbs cbcc cbcs cbko cbsc ccbc cccb cccc cccs ccob ccoc ccss ckbc ckck ckco ckcs ckcy ckob ckoc ckoo ckos ckoy cksb ckso cobb cobo cobs coby cock coco cok- coko coky coob cook coos cosc coso coss cosy coyo coys cscb cscc csco cscs csks csob csos csys cybb cybc cybo cyc- cycb cycc cycs cyy- cyyc k-os kbbb kbbc kbbk kbbo kbbs kbcb kbck kbco kbcs kbcy kbkb kbkk kbko kbky kbob kboc kbok kboo kbos kbsb kbsk kbso kbss kbsy kbyb kbyo kbys kcbc kcbk kcbs kccb kccc kcck kccy kckc kckk kcko kcky kcob kcos kcsb kcsc kcss kcsy kcyk kcys kcyy kkbb kkbo kkbs kkcb kkck kkco kkcs kkcy kkkk kkob kkoo kkoy kkss kkyc kkys kkyy kobb kobc kobk kobo kobs koby kocb kock kocs kokb kokc kokk koko koks koky koob kooc kook kooo koos kos- kosb kosc koso koss kosy koyo koyy ksbc ksbs ksby kscb ksck ksco kscs kscy kskb kskk ksko ksks ksky ksob ksoc ksok ksoo ksos ksso ksss ksyc ksyy kybb kybc kybo kyby kycc kyck kycs kykc kykk kyks kyky kyok kyoo kyos kyoy kysc kysk kyyk kyyo kyys kyyy obbo obby obkb obok obos oboy obss ocbc occc ocks ocos ocys okby okko okok okso okyo ooby ooky oooo ooos osby oscc osco osoo osos ossb osso ossy oyss s-os sbbs sbcc sbcs sccc sccs sccy sck- scob scok scoo scsc scso skss sky- skys skyy sobo sobs sock soco socs socy sokk soko sook soos sooy soso soss soyo soys ssby sscc sscs ssoc sssb sssc ssss sybo syck syco syso syss syyk ybbs yccc ycsb ykko yksc yobo yobs yock yoko yoks yoky yook yoso yoyo ysby ysco ysyb yyyy