c-- ccc ccm ccn ccp ccs cmc cmm cmn cmp cms cn- cnc cnm cnn cnp cns cpc cpm cpn cpp cps csc csm csn csp css mc- mcc mcm mcn mcp mcs mmc mmm mmn mmp mms mnc mnm mnn mnp mns mpc mpm mpn mpp mps msc msm msn msp mss ncc ncm ncn ncp ncs nmc nmm nmn nmp nms nnc nnm nnn nnp nns npc npm npn npp nps nsc nsm nsn nsp nss p-p pcc pcm pcn pcp pcs pmc pmm pmn pmp pms pn- pnc pnm pnn pnp pns ppc ppm ppn ppp pps ps- psc psm psn psp pss scc scm scn scp scs smc smm smn smp sms snc snm snn snp sns spc spm spn spp sps ss- ssc ssm ssn ssp sss