-er ddd dde ddg ddi ddo ddr dds de- ded dee deg dei deo der des dgd dge dgg dgi dgr dgs di- did die dig dii dio dir dis dod doe dog doi doo dor dos drd dre drg dri dro drr drs dsd dse dsg dsi dso dsr dss ed- edd ede edg edi edo edr eds eed eee eeg eeo eer ees egd ege egg egi ego egr egs eid eie eig eii eio eir eis eo- eod eoe eog eoi eoo eor eos erd ere erg eri ero err ers es- esd ese esg esi eso esr ess g-d gdd gde gdi gdo gdr gds ge- ged gee geg gei geo ger ges ggd ggg ggi ggo ggr ggs gid gie gig gii gio gir gis god goe gog goi goo gor gos grd gre grg gri gro grr grs gsd gse gsg gsi gso gsr gss i-d idd ide idg idi ido idr ids ie- ied iee ieg iei ier ies igd ige igg igi igo igr igs iid iie iii iio iir iis io- iod ioe iog ioi ioo ior ios ir- ird ire irg iri iro irr irs is- isd ise isg isi iso isr iss o-i odd ode odg odi odo odr ods oed oee oeg oei oeo oer oes ogd oge ogg ogi ogo ogs oid oie oii oio oir ois oo- ood oog ooi ooo oor oos or- ord ore org ori oro orr ors os- osd ose osg osi oso osr oss rdd rde rdg rdi rdo rdr rds re- red ree reg rei reo rer res rgd rge rgg rgi rgo rgr rgs rid rie rig rii rio rir ris rod roe rog roi roo ror ros rrd rrg rri rrr rrs rsd rse rsg rsi rso rsr rss sdd sde sdg sdi sdo sdr sds se- sed see seg sei seo ser ses sgd sge sgg sgi sgo sgr sgs sid sie sig sii sio sir sis sod soe sog soi soo sor sos sr- srd sre srg sri sro srr srs ss- ssd sse ssg ssi sso ssr sss