-er ddd dde ddg ddi ddp ddr dds ddt de- ded dee deg dei dep der des det dgd dge dgg dgi dgp dgr dgs dgt di- did die dig dii dip dir dis dit dpd dpe dpg dpi dpp dpr dps dpt drd dre drg dri drp drr drs drt dsd dse dsg dsi dsp dsr dss dst dtd dte dtg dti dtp dtr dts dtt ed- edd ede edg edi edp edr eds edt eed eee eeg eep eer ees eet egd ege egg egi egp egr egs egt eid eie eig eii eip eir eis eit ep- epd epe epg epi epp epr eps ept erd ere erg eri erp err ers ert es- esd ese esg esi esp esr ess est etd ete etg eti etp etr ets ett g-d g-p gdd gde gdi gdp gdr gds gdt ge- ged gee geg gei gep ger ges get ggd ggg ggi ggp ggr ggs ggt gid gie gig gii gip gir gis git gpd gpe gpg gpi gpp gpr gps gpt grd gre grg gri grp grr grs grt gsd gse gsg gsi gsp gsr gss gst gtd gte gtg gti gtp gtr gts gtt i-d idd ide idg idi idp idr ids idt ie- ied iee ieg iei iep ier ies iet igd ige igg igi igp igr igs igt iid iie iii iip iir iis iit ipd ipe ipg ipi ipp ipr ips ipt ir- ird ire irg iri irp irr irs irt is- isd ise isg isi isp isr iss ist itd ite itg iti itp its itt p-p pdd pde pdg pdi pdp pdr pds pdt ped pee peg pei pep per pes pet pgd pge pgg pgi pgp pgr pgs pgt pid pie pig pii pip pir pis pit ppd ppe ppg ppi ppp ppr pps ppt prd pre prg pri prp prr prs prt ps- psd pse psg psi psp psr pss pst pt- ptd pte ptg pti ptp ptr pts ptt rdd rde rdg rdi rdp rdr rds rdt re- red ree reg rei rep rer res ret rgd rge rgg rgi rgp rgr rgs rgt rid rie rig rii rip rir ris rit rpd rpe rpg rpi rpp rpr rps rpt rrd rrg rri rrp rrr rrs rrt rsd rse rsg rsi rsp rsr rss rst rtd rte rtg rti rtp rtr rts rtt sdd sde sdg sdi sdp sdr sds sdt se- sed see seg sei sep ser ses set sgd sge sgg sgi sgp sgr sgs sgt sid sie sig sii sip sir sis sit spd spe spg spi spp spr sps spt sr- srd sre srg sri srp srr srs srt ss- ssd sse ssg ssi ssp ssr sss sst std ste stg sti stp str sts stt tdd tde tdg tdi tdp tdr tds tdt te- ted tee teg tei tep ter tes tet tge tgg tgi tgp tgr tgs tgt tid tie tig tii tip tir tis tit tpd tpe tpg tpi tpp tpr tps tpt trd tre trg tri trp trr trs trt tsd tse tsg tsi tsp tsr tss tst ttd tte ttg tti ttp ttr tts ttt