-ic c-- ccc cce cci ccn ccs ccx ce- cec cee cei cen ces cex ci- cic cie cii cin cis cix cn- cnc cne cni cnn cns cnx csc cse csi csn css csx cxc cxi cxs cxx ec- ecc ece eci ecn ecs ecx eec eee een ees eex eic eie eii ein eis eix en- enc ene eni enn ens es- esc ese esi esn ess esx ex- exc exe exi exs exx icc ice ici icn ics ie- iec iee iei ien ies iex iic iie iii iin iis iix in- inc ine ini inn ins inx is- isc ise isi isn iss ixc ixe ixi ixn n-i ncc nce nci ncn ncs ncx ne- nec nee nei nen nes nex nic nie nii nin nis nix nnc nne nni nnn nns nsc nse nsi nsn nss nsx nxc scc sce sci scn scs scx se- sec see sei sen ses sex sic sie sii sin sis six snc sne sni snn sns ss- ssc sse ssi ssn sss ssx sxc sxi sxn sxs xci xcx xee xen xes xex xic xie xii xin xis xix xnc xns xsc xsi xss xxi xxx