-er ddd dde ddg ddi ddo ddr dds ddt de- ded dee deg dei deo der des det dgd dge dgg dgi dgr dgs dgt di- did die dig dii dio dir dis dit dod doe dog doi doo dor dos dot drd dre drg dri dro drr drs drt dsd dse dsg dsi dso dsr dss dst dtd dte dtg dti dto dtr dts dtt ed- edd ede edg edi edo edr eds edt eed eee eeg eeo eer ees eet egd ege egg egi ego egr egs egt eid eie eig eii eio eir eis eit eo- eod eoe eog eoi eoo eor eos eot erd ere erg eri ero err ers ert es- esd ese esg esi eso esr ess est etd ete etg eti eto etr ets ett g-d gdd gde gdi gdo gdr gds gdt ge- ged gee geg gei geo ger ges get ggd ggg ggi ggo ggr ggs ggt gid gie gig gii gio gir gis git god goe gog goi goo gor gos got grd gre grg gri gro grr grs grt gsd gse gsg gsi gso gsr gss gst gtd gte gtg gti gto gtr gts gtt i-d idd ide idg idi ido idr ids idt ie- ied iee ieg iei ier ies iet igd ige igg igi igo igr igs igt iid iie iii iio iir iis iit io- iod ioe iog ioi ioo ior ios iot ir- ird ire irg iri iro irr irs irt is- isd ise isg isi iso isr iss ist itd ite itg iti ito its itt o-i odd ode odg odi odo odr ods odt oed oee oeg oei oeo oer oes oet ogd oge ogg ogi ogo ogs ogt oid oie oii oio oir ois oit oo- ood oog ooi ooo oor oos oot or- ord ore org ori oro orr ors ort os- osd ose osg osi oso osr oss ost ot- otd ote otg oti oto otr ots ott rdd rde rdg rdi rdo rdr rds rdt re- red ree reg rei reo rer res ret rgd rge rgg rgi rgo rgr rgs rgt rid rie rig rii rio rir ris rit rod roe rog roi roo ror ros rot rrd rrg rri rrr rrs rrt rsd rse rsg rsi rso rsr rss rst rtd rte rtg rti rto rtr rts rtt sdd sde sdg sdi sdo sdr sds sdt se- sed see seg sei seo ser ses set sgd sge sgg sgi sgo sgr sgs sgt sid sie sig sii sio sir sis sit sod soe sog soi soo sor sos sot sr- srd sre srg sri sro srr srs srt ss- ssd sse ssg ssi sso ssr sss sst std ste stg sti sto str sts stt tdd tde tdg tdi tdo tdr tds tdt te- ted tee teg tei teo ter tes tet tge tgg tgi tgo tgr tgs tgt tid tie tig tii tio tir tis tit to- tod toe tog toi too tor tos tot trd tre trg tri tro trr trs trt tsd tse tsg tsi tso tsr tss tst ttd tte ttg tti tto ttr tts ttt