-er eee eef eel een eer ees eet ef- efe eff efl efr efs eft ele elf ell eln elr els elt en- ene enf enl enn enr ens ent ere erf erl ern err ers ert es- ese esf esl esn esr ess est ete etf etl etn etr ets ett fee fef fel fen fer fes fet ffe fff ffl ffn ffr ffs fft fle flf fll fln flr fls flt fne fnf fnl fnn fnr fns fnt fre frf frl frn frr frs frt fse fsf fsl fsn fsr fss fst fte ftf ftl ftn ftr fts ftt lee lef lel len ler les let lfe lff lfl lfn lfr lfs lft lle llf lll lln llr lls llt lne lnl lnn lnr lns lnt lrf lrn lrr lrs lrt lse lsf lsl lsn lsr lss lst lte ltf ltl ltr lts ltt ne- nee nef nel nen ner nes net nfe nff nfl nfn nfr nfs nft nle nlf nll nln nlr nls nlt nne nnf nnl nnn nns nnt nre nrf nrl nrn nrr nrs nrt nse nsf nsl nsn nsr nss nst nte ntf ntn ntr nts ntt re- ree ref rel ren rer res ret rfe rff rfl rfn rfr rfs rft rle rlf rll rln rlr rls rlt rnn rnr rns rnt rrf rrl rrn rrr rrs rrt rse rsf rsl rsn rsr rss rst rte rtf rtl rtn rtr rts rtt se- see sef sel sen ser ses set sfe sff sfl sfn sfr sfs sft sle slf sll sln slr sls slt sne snf snl snn snr sns snt sr- sre srf srl srn srr srs srt ss- sse ssf ssl ssn ssr sss sst ste stf stl stn str sts stt te- tee tef tel ten ter tes tet tfe tff tfl tfn tfr tfs tft tle tlf tll tln tlr tls tlt tne tnf tnl tnn tnr tns tnt tre trf trl trn trr trs trt tse tsf tsl tsn tsr tss tst tte ttf ttl ttn ttr tts ttt