c-- ccc ccn cco ccp ccs cn- cnc cnn cno cnp cns co- coc con coo cop cos cpc cpn cpo cpp cps csc csn cso csp css ncc ncn nco ncp ncs nnc nnn nno nnp nns no- noc non noo nop nos npc npn npo npp nps nsc nsn nso nsp nss oc- occ ocn oco ocp ocs on- onc onn ono onp ons oo- ooc oon ooo oop oos op- opc opn opo opp ops os- osc osn oso osp oss p-p pcc pcn pco pcp pcs pn- pnc pnn pno pnp pns poc pon poo pop pos ppc ppn ppo ppp pps ps- psc psn pso psp pss scc scn sco scp scs snc snn sno snp sns soc son soo sop sos spc spn spo spp sps ss- ssc ssn sso ssp sss