c-- ccc cce cch ccl ccx ce- cec cee ceh cel cex ch- chc che chh chl chx cl- clc cle clh cll clx cxc cxh cxl cxx ec- ecc ece ech ecl ecx eec eee eel eex ehc ehe ehh ehl elc ele elh ell elx ex- exc exe exh exl exx hcc hce hch hcl he- hec hee heh hel hex hhc hhe hhh hhl hlc hle hlh hll hlx hxc hxl lcc lce lch lcl lcx lec lee leh lel lex lhc lhh lhx llc lle lll lxc lxx xch xcl xcx xee xel xex xxl xxx