-th c-- ccc cce cch ccl cct ccx ce- cec cee ceh cel cet cex ch- chc che chh chl cht chx cl- clc cle clh cll clt clx ctc cte cth ctl ctt ctx cxc cxh cxl cxt cxx ec- ecc ece ech ecl ect ecx eec eee eel eet eex ehc ehe ehh ehl eht elc ele elh ell elt elx etc ete eth etl ett etx ex- exc exe exh exl ext exx hcc hce hch hcl hct he- hec hee heh hel het hex hhc hhe hhh hhl hht hlc hle hlh hll hlt hlx htc hte hth htl htt htx hxc hxl lcc lce lch lcl lct lcx lec lee leh lel let lex lhc lhh lht lhx llc lle lll llt ltc lte lth ltl ltt ltx lxc lxx t-x tcc tce tch tcl tct tcx te- tec tee teh tel tet tex th- thc the thh thl tht thx tlc tle tlh tll tlt tlx ttc tte tth ttl ttt ttx txe txl txt xch xcl xcx xee xel xet xex xht xlt xtc xtx xxl xxx