-ic c-- ccc cce cci ccl ccx ce- cec cee cei cel cex ci- cic cie cii cil cix cl- clc cle cli cll clx cxc cxi cxl cxx ec- ecc ece eci ecl ecx eec eee eel eex eic eie eii eil eix elc ele eli ell elx ex- exc exe exi exl exx icc ice ici icl ie- iec iee iei iel iex iic iie iii iil iix il- ilc ile ili ill ilx ixc ixe ixi ixl lcc lce lci lcl lcx lec lee lei lel lex lic lie lii lil lix llc lle lli lll lxc lxi lxx xci xcl xcx xee xel xex xic xie xii xix xli xxi xxl xxx