-ol c-- ccc cce ccl cco ccs ccx ce- cec cee cel ceo ces cex cl- clc cle cll clo cls clx co- coc coe col coo cos cox csc cse csl cso css csx cxc cxl cxo cxs cxx ec- ecc ece ecl eco ecs ecx eec eee eel eeo ees eex elc ele ell elo els elx eo- eoc eoe eol eoo eos es- esc ese esl eso ess esx ex- exc exe exl exo exs exx lcc lce lcl lco lcs lcx lec lee lel leo les lex llc lle lll llo lls loc loe lol loo los lox lsc lse lsl lso lss lxc lxo lxx oc- occ ocl oco ocs ocx oec oee oel oeo oes oex olc ole oll olo ols oo- ooc ool ooo oos oox os- osc ose osl oso oss osx ox- oxc oxo oxx scc sce scl sco scs scx se- sec see sel seo ses sex slc sle sll slo sls slx soc soe sol soo sos sox ss- ssc sse ssl sso sss ssx sxc sxl sxs xcl xcx xee xel xes xex xls xoc xoo xos xox xsc xsl xss xxl xxo xxx