-ic c-- ccc cci cck cco ccr ccs ci- cic cii cik cio cir cis ckc cki cko cks cky co- coc coi cok coo cor cos coy crc cri crk cro crr crs cry csc csi csk cso csr css csy cyc cyk cyo cyr cys icc ici ick ico icr ics icy iic iii iio iir iis ikc iki ikk iko ikr iks io- ioc ioi ioo ior ios ir- irc iri irk iro irr irs iry is- isc isi isk iso isr iss isy iyc iyo iyr iys iyy kcc kci kck kcr kcs kic kii kik kio kir kis kkc kki kkk kkr kks kky koc koi kok koo kor kos koy krc kri krk kro krr krs kry ksc ksi ksk kso ksr kss kyc kyo kyr kys o-i oc- occ oci ock oco ocr ocs oic oii oik oio oir ois okc oki okk oko okr oks oo- ooc ooi ook ooo oor oos or- orc ori ork oro orr ors ory os- osc osi osk oso osr oss oyi oyo oys rcc rci rco rcr rcs ric rii rik rio rir ris riy rkc rkk rko rks rky roc roi rok roo ror ros roy rrc rri rrk rrr rrs rsc rsi rsk rso rsr rss ry- ryc ryk ryo ryr rys ryy scc sci sck sco scr scs sic sii sik sio sir sis sk- skc ski skk sko skr sks sky soc soi sok soo sor sos soy sr- src sri srk sro srr srs sry ss- ssc ssi ssk sso ssr sss sy- syc syi syk syr sys ycc yci yco ycs ycy yii yio yir yis yki ykk yoc yoi yok yoo yor yos yoy yrc yro yrs ysc ysi ysk yso ysr yss ysy yyc yys yyy