c-- ccc cce cck ccl cct ce- cec cee cek cel cet ckc ckt cl- clc cle clk cll clt ctc cte ctk ctl ctt ec- ecc ece eck ecl ect eec eee eek eel eet ekc eke ekl ekt elc ele elk ell elt etc ete etk etl ett k-t kcc kce kck kcl kct ke- kec kee kek kel ket kkc kke kkk kkl kkt kl- klc klt ktc kte ktk ktl ktt lcc lce lck lcl lct lec lee lek lel let lkl lkt llc lle llk lll llt ltc lte ltk ltl ltt tcc tce tck tcl tct te- tec tee tek tel tet tkc tke tkk tkl tkt tlc tle tlk tll tlt ttc tte ttk ttl ttt