-ol c-- ccc cce ccl cco ccs cct ce- cec cee cel ceo ces cet cl- clc cle cll clo cls clt co- coc coe col coo cos cot csc cse csl cso css cst ctc cte ctl cto cts ctt ec- ecc ece ecl eco ecs ect eec eee eel eeo ees eet elc ele ell elo els elt eo- eoc eoe eol eoo eos eot es- esc ese esl eso ess est etc ete etl eto ets ett lcc lce lcl lco lcs lct lec lee lel leo les let llc lle lll llo lls llt loc loe lol loo los lot lsc lse lsl lso lss lst ltc lte ltl lto lts ltt oc- occ ocl oco ocs oct oec oee oel oeo oes oet olc ole oll olo ols olt oo- ooc ool ooo oos oot os- osc ose osl oso oss ost ot- otc ote otl oto ots ott scc sce scl sco scs sct se- sec see sel seo ses set slc sle sll slo sls slt soc soe sol soo sos sot ss- ssc sse ssl sso sss sst stc ste stl sto sts stt tcc tce tcl tco tcs tct te- tec tee tel teo tes tet tlc tle tll tlo tls tlt to- toc toe tol too tos tot tsc tse tsl tso tss tst ttc tte ttl tto tts ttt