eee eel eem een eep eet eex ele ell elm eln elp elt elx em- eme eml emm emn emp emt emx en- ene enl enm enn enp ent ep- epe epl epm epn epp ept epx ete etl etm etn etp ett etx ex- exe exl exp ext exx l-p lee lel lem len lep let lex lle lll llm lln llp llt lme lml lmm lmn lmp lmt lne lnl lnm lnn lnp lnt lpe lpl lpm lpn lpp lpt lpx lte ltl ltm ltp ltt ltx lxx mee mel mem men mep met mex mle mll mlm mln mlp mlt mlx mme mml mmm mmn mmp mmt mmx mne mnl mnm mnn mnp mnt mpe mpl mpm mpn mpp mpt mpx mte mtl mtm mtn mtp mtt mtx mxl mxn mxp ne- nee nel nem nen nep net nex nle nll nlm nln nlp nlt nlx nme nml nmm nmn nmp nmt nne nnl nnm nnn nnp nnt npe npl npm npn npp npt nte ntm ntn ntp ntt ntx nxl nxt p-p pee pel pem pen pep pet pex ple pll plm pln plp plt plx pme pml pmm pmn pmp pmt pmx pn- pne pnl pnm pnn pnp pnt pnx ppe ppl ppm ppn ppp ppt ppx pt- pte ptl ptm ptn ptp ptt ptx pxe pxl pxm pxt t-x te- tee tel tem ten tep tet tex tle tll tlm tln tlp tlt tlx tme tml tmm tmn tmp tmt tmx tne tnl tnm tnn tnp tnt tnx tpe tpl tpm tpn tpp tpt tpx tte ttl ttm ttn ttp ttt ttx txe txl txn txt xee xel xem xen xep xet xex xlm xlt xml xmm xmp xmt xmx xpe xpl xpm xpn xpp xpt xtm xtp xtx xxl xxp xxx