-ol c-- ccc cce ccf cck ccl cco cct ce- cec cee cef cek cel ceo cet cfc cfe cff cfk cfl cfo cft ckc cko ckt cl- clc cle clf clk cll clo clt co- coc coe cof cok col coo cot ctc cte ctf ctk ctl cto ctt ec- ecc ece ecf eck ecl eco ect eec eee eef eek eel eeo eet ef- efc efe eff efl efo eft ekc eke ekf ekl eko ekt elc ele elf elk ell elo elt eo- eoc eoe eof eok eol eoo eot etc ete etf etk etl eto ett fcc fce fcf fck fcl fco fct fec fee fef fek fel feo fet ffc ffe fff ffk ffl ffo fft fkc fkf fkk fkl fkt flc fle flf fll flo flt foc foe fof fok fol foo fot ftc fte ftf ftk ftl fto ftt k-t kcc kce kck kcl kct ke- kec kee kef kek kel keo ket kfc kff kfo kkc kke kkk kkl kkt kl- klc klf klo klt koc koe kof kok kol koo kot ktc kte ktf ktk ktl kto ktt lcc lce lcf lck lcl lco lct lec lee lef lek lel leo let lfc lfe lff lfk lfl lfo lft lkl lkt llc lle llf llk lll llo llt loc loe lof lok lol loo lot ltc lte ltf ltk ltl lto ltt oc- occ ocf ock ocl oco oct oec oee oef oel oeo oet of- ofc ofe off ofl ofo oft okc oke okk okl oko olc ole olf olk oll olo olt oo- ooc oof ook ool ooo oot ot- otc ote otf otk otl oto ott tcc tce tcf tck tcl tco tct te- tec tee tef tek tel teo tet tfc tfe tff tfk tfl tfo tft tkc tke tkk tkl tko tkt tlc tle tlf tlk tll tlo tlt to- toc toe tof tok tol too tot ttc tte ttf ttk ttl tto ttt