-er -ic c-- ccc cce cci ccn ccr ccs ccx ce- cec cee cei cen cer ces cex ci- cic cie cii cin cir cis cix cn- cnc cne cni cnn cnr cns cnx crc cre cri crn crr crs crx csc cse csi csn csr css csx cxc cxi cxr cxs cxx ec- ecc ece eci ecn ecr ecs ecx eec eee een eer ees eex eic eie eii ein eir eis eix en- enc ene eni enn enr ens erc ere eri ern err ers es- esc ese esi esn esr ess esx ex- exc exe exi exr exs exx icc ice ici icn icr ics ie- iec iee iei ien ier ies iex iic iie iii iin iir iis iix in- inc ine ini inn inr ins inx ir- irc ire iri irn irr irs irx is- isc ise isi isn isr iss ixc ixe ixi ixn n-i ncc nce nci ncn ncr ncs ncx ne- nec nee nei nen ner nes nex nic nie nii nin nir nis nix nnc nne nni nnn nns nrc nre nri nrn nrr nrs nrx nsc nse nsi nsn nsr nss nsx nxc rcc rce rci rcn rcr rcs rcx re- rec ree rei ren rer res rex ric rie rii rin rir ris rix rnc rni rnn rnr rns rrc rri rrn rrr rrs rsc rse rsi rsn rsr rss rsx rxr rxs scc sce sci scn scr scs scx se- sec see sei sen ser ses sex sic sie sii sin sir sis six snc sne sni snn snr sns sr- src sre sri srn srr srs srx ss- ssc sse ssi ssn ssr sss ssx sxc sxi sxn sxs xci xcr xcx xee xen xer xes xex xic xie xii xin xis xix xnc xns xrc xrx xsc xsi xss xxi xxx