c-- ccc ccg cco ccr ccs cgc cgg cgo cgr cgs cgy co- coc cog coo cor cos coy crc crg cro crr crs cry csc csg cso csr css csy cyc cyg cyo cyr cys gcc gcg gco gcr gcs ggc ggg ggo ggr ggs goc gog goo gor gos goy grc grg gro grr grs gry gsc gsg gso gsr gss gy- gyo gyr gys oc- occ ocg oco ocr ocs ogc ogg ogo ogs ogy oo- ooc oog ooo oor oos or- orc org oro orr ors ory os- osc osg oso osr oss oyo oys rcc rcg rco rcr rcs rgc rgg rgo rgr rgs roc rog roo ror ros roy rrc rrg rrr rrs rsc rsg rso rsr rss ry- ryc ryg ryo ryr rys ryy scc scg sco scr scs sgc sgg sgo sgr sgs soc sog soo sor sos soy sr- src srg sro srr srs sry ss- ssc ssg sso ssr sss sy- syc syg syr sys ycc yco ycs ycy ygc ygo yoc yog yoo yor yos yoy yrc yrg yro yrs ysc ysg yso ysr yss ysy yyc yyg yys yyy