-ic c-- ccc cce cci ccl ccs ccx ce- cec cee cei cel ces cex ci- cic cie cii cil cis cix cl- clc cle cli cll cls clx csc cse csi csl css csx cxc cxi cxl cxs cxx ec- ecc ece eci ecl ecs ecx eec eee eel ees eex eic eie eii eil eis eix elc ele eli ell els elx es- esc ese esi esl ess esx ex- exc exe exi exl exs exx icc ice ici icl ics ie- iec iee iei iel ies iex iic iie iii iil iis iix il- ilc ile ili ill ils ilx is- isc ise isi isl iss ixc ixe ixi ixl lcc lce lci lcl lcs lcx lec lee lei lel les lex lic lie lii lil lis lix llc lle lli lll lls lsc lse lsi lsl lss lxc lxi lxx scc sce sci scl scs scx se- sec see sei sel ses sex sic sie sii sil sis six slc sle sli sll sls slx ss- ssc sse ssi ssl sss ssx sxc sxi sxl sxs xci xcl xcx xee xel xes xex xic xie xii xis xix xli xls xsc xsi xsl xss xxi xxl xxx