c-- ccc cce ccl ccn ccp ccs ce- cec cee cel cen cep ces cl- clc cle cll cln clp cls cn- cnc cne cnl cnn cnp cns cpc cpe cpl cpn cpp cps csc cse csl csn csp css ec- ecc ece ecl ecn ecs eec eee eel een eep ees elc ele ell eln elp els en- enc ene enl enn enp ens ep- epc epe epl epn epp eps es- esc ese esl esn esp ess l-p lcc lce lcl lcn lcp lcs lec lee lel len lep les llc lle lll lln llp lls lnc lne lnl lnn lnp lns lpc lpe lpl lpn lpp lps lsc lse lsl lsn lsp lss ncc nce ncl ncn ncp ncs ne- nec nee nel nen nep nes nlc nle nll nln nlp nls nnc nne nnl nnn nnp nns npc npe npl npn npp nps nsc nse nsl nsn nsp nss p-p pcc pce pcl pcn pcp pcs pec pee pel pen pep pes plc ple pll pln plp pls pn- pnc pne pnl pnn pnp pns ppc ppe ppl ppn ppp pps ps- psc pse psl psn psp pss scc sce scl scn scp scs se- sec see sel sen sep ses slc sle sll sln slp sls snc sne snl snn snp sns spc spe spl spn spp sps ss- ssc sse ssl ssn ssp sss