c-- ccc cce cck ccl ccp ce- cec cee cek cel cep ckc cl- clc cle clk cll clp cpc cpe cpk cpl cpp ec- ecc ece eck ecl eec eee eek eel eep ekc eke ekl ekp elc ele elk ell elp ep- epc epe epl epp kcc kce kck kcl kcp ke- kec kee kek kel kep kkc kke kkk kkl kkp kl- klc kpc kpe kpk kpl kpp l-p lcc lce lck lcl lcp lec lee lek lel lep lkl lkp llc lle llk lll llp lpc lpe lpk lpl lpp p-p pcc pce pck pcl pcp pec pee pek pel pep pkc pke pkl pkp plc ple plk pll plp ppc ppe ppk ppl ppp