c-- ccc ccd ccg ccn cco cdc cdd cdg cdn cdo cgc cgd cgg cgn cgo cn- cnc cnd cng cnn cno co- coc cod cog con coo dcc dcd dcg dcn dco ddc ddd ddg ddn ddo dgc dgd dgg dgn dnc dnd dng dnn dno doc dod dog don doo g-d gcc gcd gcg gcn gco gdc gdd gdn gdo ggc ggd ggg ggn ggo gnc gnd gnn gno goc god gog gon goo ncc ncd ncg ncn nco ndc ndd ndg ndn ndo ngc ngd ngg ngn ngo nnc nng nnn nno no- noc nod nog non noo oc- occ ocd ocg ocn oco odc odd odg odn odo ogc ogd ogg ogn ogo on- onc ond ong onn ono oo- ooc ood oog oon ooo