c-- ccc cce cck ccl ccn cct ce- cec cee cek cel cen cet ckc ckt cl- clc cle clk cll cln clt cn- cnc cne cnl cnn cnt ctc cte ctk ctl ctn ctt ec- ecc ece eck ecl ecn ect eec eee eek eel een eet ekc eke ekl ekt elc ele elk ell eln elt en- enc ene enk enl enn ent etc ete etk etl etn ett k-t kcc kce kck kcl kcn kct ke- kec kee kek kel ken ket kkc kke kkk kkl kkn kkt kl- klc klt kn- knc kne knk knl knn knt ktc kte ktk ktl ktn ktt lcc lce lck lcl lcn lct lec lee lek lel len let lkl lkt llc lle llk lll lln llt lnc lne lnk lnl lnn lnt ltc lte ltk ltl ltt ncc nce nck ncl ncn nct ne- nec nee nek nel nen net nkc nke nkk nkn nkt nlc nle nlk nll nln nlt nnc nne nnk nnl nnn nnt ntc nte ntk ntn ntt tcc tce tck tcl tcn tct te- tec tee tek tel ten tet tkc tke tkk tkl tkt tlc tle tlk tll tln tlt tnc tne tnk tnl tnn tnt ttc tte ttk ttl ttn ttt