c-- ccc cce ccl ccn ccp ce- cec cee cel cen cep cl- clc cle cll cln clp cn- cnc cne cnl cnn cnp cpc cpe cpl cpn cpp ec- ecc ece ecl ecn eec eee eel een eep elc ele ell eln elp en- enc ene enl enn enp ep- epc epe epl epn epp l-p lcc lce lcl lcn lcp lec lee lel len lep llc lle lll lln llp lnc lne lnl lnn lnp lpc lpe lpl lpn lpp ncc nce ncl ncn ncp ne- nec nee nel nen nep nlc nle nll nln nlp nnc nne nnl nnn nnp npc npe npl npn npp p-p pcc pce pcl pcn pcp pec pee pel pen pep plc ple pll pln plp pn- pnc pne pnl pnn pnp ppc ppe ppl ppn ppp