-ol c-- ccc cck ccl cco cct ckc cko ckt cl- clc clk cll clo clt co- coc cok col coo cot ctc ctk ctl cto ctt k-t kcc kck kcl kct kkc kkk kkl kkt kl- klc klo klt koc kok kol koo kot ktc ktk ktl kto ktt lcc lck lcl lco lct lkl lkt llc llk lll llo llt loc lok lol loo lot ltc ltk ltl lto ltt oc- occ ock ocl oco oct okc okk okl oko olc olk oll olo olt oo- ooc ook ool ooo oot ot- otc otk otl oto ott tcc tck tcl tco tct tkc tkk tkl tko tkt tlc tlk tll tlo tlt to- toc tok tol too tot ttc ttk ttl tto ttt