c-- ccc ccg ccn cco ccs cgc cgg cgn cgo cgs cn- cnc cng cnn cno cns co- coc cog con coo cos csc csg csn cso css gcc gcg gcn gco gcs ggc ggg ggn ggo ggs gnc gnn gno gns goc gog gon goo gos gsc gsg gsn gso gss ncc ncg ncn nco ncs ngc ngg ngn ngo ngs nnc nng nnn nno nns no- noc nog non noo nos nsc nsg nsn nso nss oc- occ ocg ocn oco ocs ogc ogg ogn ogo ogs on- onc ong onn ono ons oo- ooc oog oon ooo oos os- osc osg osn oso oss scc scg scn sco scs sgc sgg sgn sgo sgs snc sng snn sno sns soc sog son soo sos ss- ssc ssg ssn sso sss