cccc cccs ccoc ccss ckck ckco ckcs ckcy ckoc ckoo ckos ckoy ckso cock coco cok- coko coky cook coos cosc coso coss cosy coyo coys cscc csco cscs csks csos csys cyc- cycc cycs cyy- cyyc k-os kccc kcck kccy kckc kckk kcko kcky kcos kcsc kcss kcsy kcyk kcys kcyy kkck kkco kkcs kkcy kkkk kkoo kkoy kkss kkyc kkys kkyy kock kocs kokc kokk koko koks koky kooc kook kooo koos kos- kosc koso koss kosy koyo koyy ksck ksco kscs kscy kskk ksko ksks ksky ksoc ksok ksoo ksos ksso ksss ksyc ksyy kycc kyck kycs kykc kykk kyks kyky kyok kyoo kyos kyoy kysc kysk kyyk kyyo kyys kyyy occc ocks ocos ocys okko okok okso okyo ooky oooo ooos oscc osco osoo osos osso ossy oyss s-os sccc sccs sccy sck- scok scoo scsc scso skss sky- skys skyy sock soco socs socy sokk soko sook soos sooy soso soss soyo soys sscc sscs ssoc sssc ssss syck syco syso syss syyk yccc ykko yksc yock yoko yoks yoky yook yoso yoyo ysco yyyy