eee eef eel een eep ees eet ef- efe eff efl efp efs eft ele elf ell eln elp els elt en- ene enf enl enn enp ens ent ep- epe epf epl epn epp eps ept es- ese esf esl esn esp ess est ete etf etl etn etp ets ett fee fef fel fen fep fes fet ffe fff ffl ffn ffp ffs fft fle flf fll fln flp fls flt fne fnf fnl fnn fnp fns fnt fpe fpl fpn fpp fps fpt fse fsf fsl fsn fsp fss fst fte ftf ftl ftn ftp fts ftt l-p lee lef lel len lep les let lfe lff lfl lfn lfp lfs lft lle llf lll lln llp lls llt lne lnl lnn lnp lns lnt lpe lpf lpl lpn lpp lps lpt lse lsf lsl lsn lsp lss lst lte ltf ltl ltp lts ltt ne- nee nef nel nen nep nes net nfe nff nfl nfn nfp nfs nft nle nlf nll nln nlp nls nlt nne nnf nnl nnn nnp nns nnt npe npf npl npn npp nps npt nse nsf nsl nsn nsp nss nst nte ntf ntn ntp nts ntt p-p pee pef pel pen pep pes pet pfe pff pfl pfn pfp pfs pft ple plf pll pln plp pls plt pn- pne pnf pnl pnn pnp pns pnt ppe ppf ppl ppn ppp pps ppt ps- pse psf psl psn psp pss pst pt- pte ptf ptl ptn ptp pts ptt se- see sef sel sen sep ses set sfe sff sfl sfn sfp sfs sft sle slf sll sln slp sls slt sne snf snl snn snp sns snt spe spf spl spn spp sps spt ss- sse ssf ssl ssn ssp sss sst ste stf stl stn stp sts stt te- tee tef tel ten tep tes tet tfe tff tfl tfn tfp tfs tft tle tlf tll tln tlp tls tlt tne tnf tnl tnn tnp tns tnt tpe tpf tpl tpn tpp tps tpt tse tsf tsl tsn tsp tss tst tte ttf ttl ttn ttp tts ttt