-ol c-- ccc ccf cck ccl cco cct cfc cff cfk cfl cfo cft ckc cko ckt cl- clc clf clk cll clo clt co- coc cof cok col coo cot ctc ctf ctk ctl cto ctt fcc fcf fck fcl fco fct ffc fff ffk ffl ffo fft fkc fkf fkk fkl fkt flc flf fll flo flt foc fof fok fol foo fot ftc ftf ftk ftl fto ftt k-t kcc kck kcl kct kfc kff kfo kkc kkk kkl kkt kl- klc klf klo klt koc kof kok kol koo kot ktc ktf ktk ktl kto ktt lcc lcf lck lcl lco lct lfc lff lfk lfl lfo lft lkl lkt llc llf llk lll llo llt loc lof lok lol loo lot ltc ltf ltk ltl lto ltt oc- occ ocf ock ocl oco oct of- ofc off ofl ofo oft okc okk okl oko olc olf olk oll olo olt oo- ooc oof ook ool ooo oot ot- otc otf otk otl oto ott tcc tcf tck tcl tco tct tfc tff tfk tfl tfo tft tkc tkk tkl tko tkt tlc tlf tlk tll tlo tlt to- toc tof tok tol too tot ttc ttf ttk ttl tto ttt