-ol c-- ccc cce cck ccl cco ccs cct ce- cec cee cek cel ceo ces cet ckc cko cks ckt cl- clc cle clk cll clo cls clt co- coc coe cok col coo cos cot csc cse csk csl cso css cst ctc cte ctk ctl cto cts ctt ec- ecc ece eck ecl eco ecs ect eec eee eek eel eeo ees eet ekc eke ekl eko eks ekt elc ele elk ell elo els elt eo- eoc eoe eok eol eoo eos eot es- esc ese esk esl eso ess est etc ete etk etl eto ets ett k-t kcc kce kck kcl kcs kct ke- kec kee kek kel keo kes ket kkc kke kkk kkl kks kkt kl- klc klo kls klt koc koe kok kol koo kos kot ksc kse ksk ksl kso kss kst ktc kte ktk ktl kto kts ktt lcc lce lck lcl lco lcs lct lec lee lek lel leo les let lkl lks lkt llc lle llk lll llo lls llt loc loe lok lol loo los lot lsc lse lsk lsl lso lss lst ltc lte ltk ltl lto lts ltt oc- occ ock ocl oco ocs oct oec oee oel oeo oes oet okc oke okk okl oko oks olc ole olk oll olo ols olt oo- ooc ook ool ooo oos oot os- osc ose osk osl oso oss ost ot- otc ote otk otl oto ots ott scc sce sck scl sco scs sct se- sec see sek sel seo ses set sk- skc ske skk skl sko sks skt slc sle slk sll slo sls slt soc soe sok sol soo sos sot ss- ssc sse ssk ssl sso sss sst stc ste stk stl sto sts stt tcc tce tck tcl tco tcs tct te- tec tee tek tel teo tes tet tkc tke tkk tkl tko tks tkt tlc tle tlk tll tlo tls tlt to- toc toe tok tol too tos tot tsc tse tsk tsl tso tss tst ttc tte ttk ttl tto tts ttt