-ol c-- ccc cce cck ccl cco cct ce- cec cee cek cel ceo cet ckc cko ckt cl- clc cle clk cll clo clt co- coc coe cok col coo cot ctc cte ctk ctl cto ctt ec- ecc ece eck ecl eco ect eec eee eek eel eeo eet ekc eke ekl eko ekt elc ele elk ell elo elt eo- eoc eoe eok eol eoo eot etc ete etk etl eto ett k-t kcc kce kck kcl kct ke- kec kee kek kel keo ket kkc kke kkk kkl kkt kl- klc klo klt koc koe kok kol koo kot ktc kte ktk ktl kto ktt lcc lce lck lcl lco lct lec lee lek lel leo let lkl lkt llc lle llk lll llo llt loc loe lok lol loo lot ltc lte ltk ltl lto ltt oc- occ ock ocl oco oct oec oee oel oeo oet okc oke okk okl oko olc ole olk oll olo olt oo- ooc ook ool ooo oot ot- otc ote otk otl oto ott tcc tce tck tcl tco tct te- tec tee tek tel teo tet tkc tke tkk tkl tko tkt tlc tle tlk tll tlo tlt to- toc toe tok tol too tot ttc tte ttk ttl tto ttt