eee eel eem een eep ees ele ell elm eln elp els em- eme eml emm emn emp ems en- ene enl enm enn enp ens ep- epe epl epm epn epp eps es- ese esl esm esn esp ess l-p lee lel lem len lep les lle lll llm lln llp lls lme lml lmm lmn lmp lms lne lnl lnm lnn lnp lns lpe lpl lpm lpn lpp lps lse lsl lsm lsn lsp lss mee mel mem men mep mes mle mll mlm mln mlp mls mme mml mmm mmn mmp mms mne mnl mnm mnn mnp mns mpe mpl mpm mpn mpp mps mse msl msm msn msp mss ne- nee nel nem nen nep nes nle nll nlm nln nlp nls nme nml nmm nmn nmp nms nne nnl nnm nnn nnp nns npe npl npm npn npp nps nse nsl nsm nsn nsp nss p-p pee pel pem pen pep pes ple pll plm pln plp pls pme pml pmm pmn pmp pms pn- pne pnl pnm pnn pnp pns ppe ppl ppm ppn ppp pps ps- pse psl psm psn psp pss se- see sel sem sen sep ses sle sll slm sln slp sls sme sml smm smn smp sms sne snl snm snn snp sns spe spl spm spn spp sps ss- sse ssl ssm ssn ssp sss