c-- ccc ccd ccn cco ccp ccr cdc cdd cdn cdo cdp cdr cn- cnc cnd cnn cno cnp cnr co- coc cod con coo cop cor cpc cpd cpn cpo cpp cpr crc crd crn cro crp crr dcc dcd dcn dco dcp dcr ddc ddd ddn ddo ddp ddr dnc dnd dnn dno dnp dnr doc dod don doo dop dor dpc dpd dpn dpo dpp dpr drc drd drn dro drp drr ncc ncd ncn nco ncp ncr ndc ndd ndn ndo ndp ndr nnc nnn nno nnp no- noc nod non noo nop nor npc npd npn npo npp npr nrc nrd nrn nro nrp nrr oc- occ ocd ocn oco ocp ocr odc odd odn odo odp odr on- onc ond onn ono onp onr oo- ooc ood oon ooo oop oor op- opc opd opn opo opp opr or- orc ord orn oro orp orr p-p pcc pcd pcn pco pcp pcr pdc pdd pdn pdo pdp pdr pn- pnc pnd pnn pno pnp pnr poc pod pon poo pop por ppc ppd ppn ppo ppp ppr prc prd prn pro prp prr rcc rcd rcn rco rcp rcr rdc rdd rdn rdo rdp rdr rnc rnd rnn rno rnp rnr roc rod ron roo rop ror rpc rpd rpn rpo rpp rpr rrc rrd rrn rrp rrr