-ic c-- ccc cce cci ccn ccp ccx ce- cec cee cei cen cep cex ci- cic cie cii cin cip cix cn- cnc cne cni cnn cnp cnx cpc cpe cpi cpn cpp cpx cxc cxi cxp cxx ec- ecc ece eci ecn ecx eec eee een eep eex eic eie eii ein eip eix en- enc ene eni enn enp ep- epc epe epi epn epp epx ex- exc exe exi exp exx icc ice ici icn icp ie- iec iee iei ien iep iex iic iie iii iin iip iix in- inc ine ini inn inp inx ipc ipe ipi ipn ipp ipx ixc ixe ixi ixn n-i ncc nce nci ncn ncp ncx ne- nec nee nei nen nep nex nic nie nii nin nip nix nnc nne nni nnn nnp npc npe npi npn npp nxc p-p pcc pce pci pcn pcp pcx pec pee pei pen pep pex pic pie pii pin pip pix pn- pnc pne pni pnn pnp pnx ppc ppe ppi ppn ppp ppx pxc pxe xci xcp xcx xee xen xep xex xic xie xii xin xix xnc xpc xpe xpn xpp xxi xxp xxx