-er ddd dde ddf ddl ddn ddr dds de- ded dee def del den der des dfd dfe dff dfl dfn dfr dfs dl- dld dle dlf dll dlr dls dnd dne dnf dnl dnn dnr dns drd dre drl drn drr drs dsd dse dsf dsl dsn dsr dss ed- edd ede edf edl edn edr eds eed eee eef eel een eer ees ef- efd efe eff efl efr efs eld ele elf ell eln elr els en- end ene enf enl enn enr ens erd ere erf erl ern err ers es- esd ese esf esl esn esr ess fdd fde fdf fdl fdn fdr fds fed fee fef fel fen fer fes ffd ffe fff ffl ffn ffr ffs fld fle flf fll fln flr fls fnd fne fnf fnl fnn fnr fns frd fre frf frl frn frr frs fsd fse fsf fsl fsn fsr fss ldd lde ldf ldl ldn ldr lds led lee lef lel len ler les lfd lfe lff lfl lfn lfr lfs lld lle llf lll lln llr lls lnd lne lnl lnn lnr lns lrd lrf lrn lrr lrs lsd lse lsf lsl lsn lsr lss ndd nde ndf ndl ndn ndr nds ne- ned nee nef nel nen ner nes nfd nfe nff nfl nfn nfr nfs nld nle nlf nll nln nlr nls nne nnf nnl nnn nns nrd nre nrf nrl nrn nrr nrs nsd nse nsf nsl nsn nsr nss rdd rde rdf rdl rdn rdr rds re- red ree ref rel ren rer res rfd rfe rff rfl rfn rfr rfs rld rle rlf rll rln rlr rls rnd rnn rnr rns rrd rrf rrl rrn rrr rrs rsd rse rsf rsl rsn rsr rss sdd sde sdf sdl sdn sdr sds se- sed see sef sel sen ser ses sfd sfe sff sfl sfn sfr sfs sld sle slf sll sln slr sls snd sne snf snl snn snr sns sr- srd sre srf srl srn srr srs ss- ssd sse ssf ssl ssn ssr sss