-er ddd dde ddf ddg ddi ddo ddr dds de- ded dee def deg dei deo der des dfd dfe dff dfg dfi dfo dfr dfs dgd dge dgf dgg dgi dgr dgs di- did die dif dig dii dio dir dis dod doe dof dog doi doo dor dos drd dre drg dri dro drr drs dsd dse dsf dsg dsi dso dsr dss ed- edd ede edf edg edi edo edr eds eed eee eef eeg eeo eer ees ef- efd efe eff efg efi efo efr efs egd ege egf egg egi ego egr egs eid eie eif eig eii eio eir eis eo- eod eoe eof eog eoi eoo eor eos erd ere erf erg eri ero err ers es- esd ese esf esg esi eso esr ess fdd fde fdf fdg fdi fdo fdr fds fed fee fef feg fei feo fer fes ffd ffe fff ffg ffi ffo ffr ffs fgd fge fgf fgg fgi fgr fgs fid fie fif fig fii fir fis foe fof fog foi foo for fos frd fre frf frg fri fro frr frs fsd fse fsf fsg fsi fso fsr fss g-d gdd gde gdf gdi gdo gdr gds ge- ged gee gef geg gei geo ger ges gfd gfe gff gfi gfo gfr gfs ggd ggg ggi ggo ggr ggs gid gie gif gig gii gio gir gis god goe gof gog goi goo gor gos grd gre grf grg gri gro grr grs gsd gse gsf gsg gsi gso gsr gss i-d i-f idd ide idf idg idi ido idr ids ie- ied iee ief ieg iei ier ies ifd ife iff ifg ifi ifo ifr ifs igd ige igf igg igi igo igr igs iid iie iif iii iio iir iis io- iod ioe iof iog ioi ioo ior ios ir- ird ire irf irg iri iro irr irs is- isd ise isf isg isi iso isr iss o-i odd ode odf odg odi odo odr ods oed oee oef oeg oei oeo oer oes of- ofd ofe off ofg ofi ofo ofr ofs ogd oge ogf ogg ogi ogo ogs oid oie oif oii oio oir ois oo- ood oof oog ooi ooo oor oos or- ord ore orf org ori oro orr ors os- osd ose osf osg osi oso osr oss rdd rde rdf rdg rdi rdo rdr rds re- red ree ref reg rei reo rer res rfd rfe rff rfg rfi rfo rfr rfs rgd rge rgf rgg rgi rgo rgr rgs rid rie rif rig rii rio rir ris rod roe rof rog roi roo ror ros rrd rrf rrg rri rrr rrs rsd rse rsf rsg rsi rso rsr rss sdd sde sdf sdg sdi sdo sdr sds se- sed see sef seg sei seo ser ses sfd sfe sff sfg sfi sfo sfr sfs sgd sge sgf sgg sgi sgo sgr sgs sid sie sif sig sii sio sir sis sod soe sof sog soi soo sor sos sr- srd sre srf srg sri sro srr srs ss- ssd sse ssf ssg ssi sso ssr sss