-er ddd dde ddf ddg ddi ddo ddr dds ddt de- ded dee def deg dei deo der des det dfd dfe dff dfg dfi dfo dfr dfs dft dgd dge dgf dgg dgi dgr dgs dgt di- did die dif dig dii dio dir dis dit dod doe dof dog doi doo dor dos dot drd dre drg dri dro drr drs drt dsd dse dsf dsg dsi dso dsr dss dst dtd dte dtf dtg dti dto dtr dts dtt ed- edd ede edf edg edi edo edr eds edt eed eee eef eeg eeo eer ees eet ef- efd efe eff efg efi efo efr efs eft egd ege egf egg egi ego egr egs egt eid eie eif eig eii eio eir eis eit eo- eod eoe eof eog eoi eoo eor eos eot erd ere erf erg eri ero err ers ert es- esd ese esf esg esi eso esr ess est etd ete etf etg eti eto etr ets ett fdd fde fdf fdg fdi fdo fdr fds fdt fed fee fef feg fei feo fer fes fet ffd ffe fff ffg ffi ffo ffr ffs fft fgd fge fgf fgg fgi fgr fgs fgt fid fie fif fig fii fir fis fit foe fof fog foi foo for fos fot frd fre frf frg fri fro frr frs frt fsd fse fsf fsg fsi fso fsr fss fst ftd fte ftf ftg fti fto ftr fts ftt g-d gdd gde gdf gdi gdo gdr gds gdt ge- ged gee gef geg gei geo ger ges get gfd gfe gff gfi gfo gfr gfs gft ggd ggg ggi ggo ggr ggs ggt gid gie gif gig gii gio gir gis git god goe gof gog goi goo gor gos got grd gre grf grg gri gro grr grs grt gsd gse gsf gsg gsi gso gsr gss gst gtd gte gtf gtg gti gto gtr gts gtt i-d i-f idd ide idf idg idi ido idr ids idt ie- ied iee ief ieg iei ier ies iet ifd ife iff ifg ifi ifo ifr ifs ift igd ige igf igg igi igo igr igs igt iid iie iif iii iio iir iis iit io- iod ioe iof iog ioi ioo ior ios iot ir- ird ire irf irg iri iro irr irs irt is- isd ise isf isg isi iso isr iss ist itd ite itf itg iti ito its itt o-i odd ode odf odg odi odo odr ods odt oed oee oef oeg oei oeo oer oes oet of- ofd ofe off ofg ofi ofo ofr ofs oft ogd oge ogf ogg ogi ogo ogs ogt oid oie oif oii oio oir ois oit oo- ood oof oog ooi ooo oor oos oot or- ord ore orf org ori oro orr ors ort os- osd ose osf osg osi oso osr oss ost ot- otd ote otf otg oti oto otr ots ott rdd rde rdf rdg rdi rdo rdr rds rdt re- red ree ref reg rei reo rer res ret rfd rfe rff rfg rfi rfo rfr rfs rft rgd rge rgf rgg rgi rgo rgr rgs rgt rid rie rif rig rii rio rir ris rit rod roe rof rog roi roo ror ros rot rrd rrf rrg rri rrr rrs rrt rsd rse rsf rsg rsi rso rsr rss rst rtd rte rtf rtg rti rto rtr rts rtt sdd sde sdf sdg sdi sdo sdr sds sdt se- sed see sef seg sei seo ser ses set sfd sfe sff sfg sfi sfo sfr sfs sft sgd sge sgf sgg sgi sgo sgr sgs sgt sid sie sif sig sii sio sir sis sit sod soe sof sog soi soo sor sos sot sr- srd sre srf srg sri sro srr srs srt ss- ssd sse ssf ssg ssi sso ssr sss sst std ste stf stg sti sto str sts stt tdd tde tdf tdg tdi tdo tdr tds tdt te- ted tee tef teg tei teo ter tes tet tfd tfe tff tfg tfi tfo tfr tfs tft tge tgf tgg tgi tgo tgr tgs tgt tid tie tif tig tii tio tir tis tit to- tod toe tof tog toi too tor tos tot trd tre trf trg tri tro trr trs trt tsd tse tsf tsg tsi tso tsr tss tst ttd tte ttf ttg tti tto ttr tts ttt