c-- ccc cce ccn ccp ccv ce- cec cee cen cep cev cn- cnc cne cnn cnp cnv cpc cpe cpn cpp cpv cvc cve cvn cvp cvv ec- ecc ece ecn ecv eec eee een eep eev en- enc ene enn enp env ep- epc epe epn epp evc eve evn evp evv ncc nce ncn ncp ncv ne- nec nee nen nep nev nnc nne nnn nnp nnv npc npe npn npp npv nvc nve nvn nvp nvv p-p pcc pce pcn pcp pcv pec pee pen pep pev pn- pnc pne pnn pnp pnv ppc ppe ppn ppp ppv pvc pve pvn pvp pvv v-e vcc vce vcn vcp vec vee ven vep vn- vnp vnv vpc vpe vpn vpp vvc vvv