-ic c-- ccc ccg cci cck cco ccr ccs cgc cgg cgi cgo cgr cgs ci- cic cig cii cik cio cir cis ckc cki cko cks co- coc cog coi cok coo cor cos crc crg cri crk cro crr crs csc csg csi csk cso csr css gcc gcg gci gck gco gcr gcs ggc ggg ggi ggo ggr ggs gic gig gii gik gio gir gis gko gks goc gog goi gok goo gor gos grc grg gri grk gro grr grs gsc gsg gsi gsk gso gsr gss icc icg ici ick ico icr ics igc igg igi igk igo igr igs iic iii iio iir iis ikc iki ikk iko ikr iks io- ioc iog ioi ioo ior ios ir- irc irg iri irk iro irr irs is- isc isg isi isk iso isr iss kcc kcg kci kck kcr kcs kgc kgi kgo kgs kic kig kii kik kio kir kis kkc kki kkk kkr kks koc kog koi kok koo kor kos krc krg kri krk kro krr krs ksc ksg ksi ksk kso ksr kss o-i oc- occ ocg oci ock oco ocr ocs ogc ogg ogi ogo ogs oic oii oik oio oir ois okc okg oki okk oko okr oks oo- ooc oog ooi ook ooo oor oos or- orc org ori ork oro orr ors os- osc osg osi osk oso osr oss rcc rcg rci rco rcr rcs rgc rgg rgi rgk rgo rgr rgs ric rig rii rik rio rir ris rkc rkg rkk rko rks roc rog roi rok roo ror ros rrc rrg rri rrk rrr rrs rsc rsg rsi rsk rso rsr rss scc scg sci sck sco scr scs sgc sgg sgi sgk sgo sgr sgs sic sig sii sik sio sir sis sk- skc skg ski skk sko skr sks soc sog soi sok soo sor sos sr- src srg sri srk sro srr srs ss- ssc ssg ssi ssk sso ssr sss