-ic c-- ccc cce cci ccn ccp ccs ccx ce- cec cee cei cen cep ces cex ci- cic cie cii cin cip cis cix cn- cnc cne cni cnn cnp cns cnx cpc cpe cpi cpn cpp cps cpx csc cse csi csn csp css csx cxc cxi cxp cxs cxx ec- ecc ece eci ecn ecs ecx eec eee een eep ees eex eic eie eii ein eip eis eix en- enc ene eni enn enp ens ep- epc epe epi epn epp eps epx es- esc ese esi esn esp ess esx ex- exc exe exi exp exs exx icc ice ici icn icp ics ie- iec iee iei ien iep ies iex iic iie iii iin iip iis iix in- inc ine ini inn inp ins inx ipc ipe ipi ipn ipp ips ipx is- isc ise isi isn isp iss ixc ixe ixi ixn n-i ncc nce nci ncn ncp ncs ncx ne- nec nee nei nen nep nes nex nic nie nii nin nip nis nix nnc nne nni nnn nnp nns npc npe npi npn npp nps nsc nse nsi nsn nsp nss nsx nxc p-p pcc pce pci pcn pcp pcs pcx pec pee pei pen pep pes pex pic pie pii pin pip pis pix pn- pnc pne pni pnn pnp pns pnx ppc ppe ppi ppn ppp pps ppx ps- psc pse psi psn psp pss psx pxc pxe pxs scc sce sci scn scp scs scx se- sec see sei sen sep ses sex sic sie sii sin sip sis six snc sne sni snn snp sns spc spe spi spn spp sps spx ss- ssc sse ssi ssn ssp sss ssx sxc sxi sxn sxs xci xcp xcx xee xen xep xes xex xic xie xii xin xis xix xnc xns xpc xpe xpn xpp xps xsc xsi xsp xss xxi xxp xxx