-ol c-- ccc cce ccl cco ccs ce- cec cee cel ceo ces cl- clc cle cll clo cls co- coc coe col coo cos csc cse csl cso css ec- ecc ece ecl eco ecs eec eee eel eeo ees elc ele ell elo els eo- eoc eoe eol eoo eos es- esc ese esl eso ess lcc lce lcl lco lcs lec lee lel leo les llc lle lll llo lls loc loe lol loo los lsc lse lsl lso lss oc- occ ocl oco ocs oec oee oel oeo oes olc ole oll olo ols oo- ooc ool ooo oos os- osc ose osl oso oss scc sce scl sco scs se- sec see sel seo ses slc sle sll slo sls soc soe sol soo sos ss- ssc sse ssl sso sss