-er ddd dde ddf ddg ddi ddr dds ddt de- ded dee def deg dei der des det dfd dfe dff dfg dfi dfr dfs dft dgd dge dgf dgg dgi dgr dgs dgt di- did die dif dig dii dir dis dit drd dre drg dri drr drs drt dsd dse dsf dsg dsi dsr dss dst dtd dte dtf dtg dti dtr dts dtt ed- edd ede edf edg edi edr eds edt eed eee eef eeg eer ees eet ef- efd efe eff efg efi efr efs eft egd ege egf egg egi egr egs egt eid eie eif eig eii eir eis eit erd ere erf erg eri err ers ert es- esd ese esf esg esi esr ess est etd ete etf etg eti etr ets ett fdd fde fdf fdg fdi fdr fds fdt fed fee fef feg fei fer fes fet ffd ffe fff ffg ffi ffr ffs fft fgd fge fgf fgg fgi fgr fgs fgt fid fie fif fig fii fir fis fit frd fre frf frg fri frr frs frt fsd fse fsf fsg fsi fsr fss fst ftd fte ftf ftg fti ftr fts ftt g-d gdd gde gdf gdi gdr gds gdt ge- ged gee gef geg gei ger ges get gfd gfe gff gfi gfr gfs gft ggd ggg ggi ggr ggs ggt gid gie gif gig gii gir gis git grd gre grf grg gri grr grs grt gsd gse gsf gsg gsi gsr gss gst gtd gte gtf gtg gti gtr gts gtt i-d i-f idd ide idf idg idi idr ids idt ie- ied iee ief ieg iei ier ies iet ifd ife iff ifg ifi ifr ifs ift igd ige igf igg igi igr igs igt iid iie iif iii iir iis iit ir- ird ire irf irg iri irr irs irt is- isd ise isf isg isi isr iss ist itd ite itf itg iti its itt rdd rde rdf rdg rdi rdr rds rdt re- red ree ref reg rei rer res ret rfd rfe rff rfg rfi rfr rfs rft rgd rge rgf rgg rgi rgr rgs rgt rid rie rif rig rii rir ris rit rrd rrf rrg rri rrr rrs rrt rsd rse rsf rsg rsi rsr rss rst rtd rte rtf rtg rti rtr rts rtt sdd sde sdf sdg sdi sdr sds sdt se- sed see sef seg sei ser ses set sfd sfe sff sfg sfi sfr sfs sft sgd sge sgf sgg sgi sgr sgs sgt sid sie sif sig sii sir sis sit sr- srd sre srf srg sri srr srs srt ss- ssd sse ssf ssg ssi ssr sss sst std ste stf stg sti str sts stt tdd tde tdf tdg tdi tdr tds tdt te- ted tee tef teg tei ter tes tet tfd tfe tff tfg tfi tfr tfs tft tge tgf tgg tgi tgr tgs tgt tid tie tif tig tii tir tis tit trd tre trf trg tri trr trs trt tsd tse tsf tsg tsi tsr tss tst ttd tte ttf ttg tti ttr tts ttt