-ic c-- ccc cci cck ccr ccs ci- cic cii cik cir cis ckc cki cks crc cri crk crr crs csc csi csk csr css icc ici ick icr ics iic iii iir iis ikc iki ikk ikr iks ir- irc iri irk irr irs is- isc isi isk isr iss kcc kci kck kcr kcs kic kii kik kir kis kkc kki kkk kkr kks krc kri krk krr krs ksc ksi ksk ksr kss rcc rci rcr rcs ric rii rik rir ris rkc rkk rks rrc rri rrk rrr rrs rsc rsi rsk rsr rss scc sci sck scr scs sic sii sik sir sis sk- skc ski skk skr sks sr- src sri srk srr srs ss- ssc ssi ssk ssr sss