c-- ccc ccd ccn cco ccp ccs cdc cdd cdn cdo cdp cds cn- cnc cnd cnn cno cnp cns co- coc cod con coo cop cos cpc cpd cpn cpo cpp cps csc csd csn cso csp css dcc dcd dcn dco dcp dcs ddc ddd ddn ddo ddp dds dnc dnd dnn dno dnp dns doc dod don doo dop dos dpc dpd dpn dpo dpp dps dsc dsd dsn dso dsp dss ncc ncd ncn nco ncp ncs ndc ndd ndn ndo ndp nds nnc nnn nno nnp nns no- noc nod non noo nop nos npc npd npn npo npp nps nsc nsd nsn nso nsp nss oc- occ ocd ocn oco ocp ocs odc odd odn odo odp ods on- onc ond onn ono onp ons oo- ooc ood oon ooo oop oos op- opc opd opn opo opp ops os- osc osd osn oso osp oss p-p pcc pcd pcn pco pcp pcs pdc pdd pdn pdo pdp pds pn- pnc pnd pnn pno pnp pns poc pod pon poo pop pos ppc ppd ppn ppo ppp pps ps- psc psd psn pso psp pss scc scd scn sco scp scs sdc sdd sdn sdo sdp sds snc snd snn sno snp sns soc sod son soo sop sos spc spd spn spo spp sps ss- ssc ssd ssn sso ssp sss