c-- ccc ccg ccn ccr ccs cgc cgg cgn cgr cgs cn- cnc cng cnn cnr cns crc crg crn crr crs csc csg csn csr css gcc gcg gcn gcr gcs ggc ggg ggn ggr ggs gnc gnn gnr gns grc grg grn grr grs gsc gsg gsn gsr gss ncc ncg ncn ncr ncs ngc ngg ngn ngs nnc nng nnn nns nrc nrg nrn nrr nrs nsc nsg nsn nsr nss rcc rcg rcn rcr rcs rgc rgg rgn rgr rgs rnc rng rnn rnr rns rrc rrg rrn rrr rrs rsc rsg rsn rsr rss scc scg scn scr scs sgc sgg sgn sgr sgs snc sng snn snr sns sr- src srg srn srr srs ss- ssc ssg ssn ssr sss