c-- ccc ccg ccn cco ccr cgc cgg cgn cgo cgr cn- cnc cng cnn cno cnr co- coc cog con coo cor crc crg crn cro crr gcc gcg gcn gco gcr ggc ggg ggn ggo ggr gnc gnn gno gnr goc gog gon goo gor grc grg grn gro grr ncc ncg ncn nco ncr ngc ngg ngn ngo nnc nng nnn nno no- noc nog non noo nor nrc nrg nrn nro nrr oc- occ ocg ocn oco ocr ogc ogg ogn ogo on- onc ong onn ono onr oo- ooc oog oon ooo oor or- orc org orn oro orr rcc rcg rcn rco rcr rgc rgg rgn rgo rgr rnc rng rnn rno rnr roc rog ron roo ror rrc rrg rrn rrr