-ic c-- ccc cci cck cco ccs ci- cic cii cik cio cis ckc cki cko cks cky co- coc coi cok coo cos coy csc csi csk cso css csy cyc cyk cyo cys icc ici ick ico ics icy iic iii iio iis ikc iki ikk iko iks io- ioc ioi ioo ios is- isc isi isk iso iss isy iyc iyo iys iyy kcc kci kck kcs kic kii kik kio kis kkc kki kkk kks kky koc koi kok koo kos koy ksc ksi ksk kso kss kyc kyo kys o-i oc- occ oci ock oco ocs oic oii oik oio ois okc oki okk oko oks oo- ooc ooi ook ooo oos os- osc osi osk oso oss oyi oyo oys scc sci sck sco scs sic sii sik sio sis sk- skc ski skk sko sks sky soc soi sok soo sos soy ss- ssc ssi ssk sso sss sy- syc syi syk sys ycc yci yco ycs ycy yii yio yis yki ykk yoc yoi yok yoo yos yoy ysc ysi ysk yso yss ysy yyc yys yyy