c-- ccc cch ccr ccs ch- chc chh chr chs chy crc crh crr crs cry csc csh csr css csy cyc cyr cys hcc hch hcr hcs hcy hhc hhh hhr hhs hhy hr- hrc hrh hrr hrs hsc hsh hsr hss hsy hy- hyc hyh hyr hys hyy rcc rch rcr rcs rh- rhc rhh rhr rhs rrc rrh rrr rrs rsc rsh rsr rss ry- ryc ryr rys ryy scc sch scr scs sh- shc shh shr shs shy sr- src srh srr srs sry ss- ssc ssh ssr sss sy- syc syh syr sys ycc ych ycs ycy yhc yhs yrc yrs ysc ysr yss ysy yyc yys yyy