c-- ccc ccg ccr ccs cgc cgg cgr cgs cgy crc crg crr crs cry csc csg csr css csy cyc cyg cyr cys gcc gcg gcr gcs ggc ggg ggr ggs grc grg grr grs gry gsc gsg gsr gss gy- gyr gys rcc rcg rcr rcs rgc rgg rgr rgs rrc rrg rrr rrs rsc rsg rsr rss ry- ryc ryg ryr rys ryy scc scg scr scs sgc sgg sgr sgs sr- src srg srr srs sry ss- ssc ssg ssr sss sy- syc syg syr sys ycc ycs ycy ygc yrc yrg yrs ysc ysg ysr yss ysy yyc yyg yys yyy