-er ddd dde ddf ddg ddo ddp ddr dds de- ded dee def deg deo dep der des dfd dfe dff dfg dfo dfp dfr dfs dgd dge dgf dgg dgp dgr dgs dod doe dof dog doo dop dor dos dpd dpe dpf dpg dpo dpp dpr dps drd dre drg dro drp drr drs dsd dse dsf dsg dso dsp dsr dss ed- edd ede edf edg edo edp edr eds eed eee eef eeg eeo eep eer ees ef- efd efe eff efg efo efp efr efs egd ege egf egg ego egp egr egs eo- eod eoe eof eog eoo eop eor eos ep- epd epe epf epg epo epp epr eps erd ere erf erg ero erp err ers es- esd ese esf esg eso esp esr ess fdd fde fdf fdg fdo fdp fdr fds fed fee fef feg feo fep fer fes ffd ffe fff ffg ffo ffp ffr ffs fgd fge fgf fgg fgp fgr fgs foe fof fog foo fop for fos fpd fpe fpg fpo fpp fpr fps frd fre frf frg fro frp frr frs fsd fse fsf fsg fso fsp fsr fss g-d g-p gdd gde gdf gdo gdp gdr gds ge- ged gee gef geg geo gep ger ges gfd gfe gff gfo gfp gfr gfs ggd ggg ggo ggp ggr ggs god goe gof gog goo gop gor gos gpd gpe gpf gpg gpo gpp gpr gps grd gre grf grg gro grp grr grs gsd gse gsf gsg gso gsp gsr gss odd ode odf odg odo odp odr ods oed oee oef oeg oeo oep oer oes of- ofd ofe off ofg ofo ofp ofr ofs ogd oge ogf ogg ogo ogp ogs oo- ood oof oog ooo oop oor oos op- opd ope opf opg opo opp opr ops or- ord ore orf org oro orp orr ors os- osd ose osf osg oso osp osr oss p-p pdd pde pdf pdg pdo pdp pdr pds ped pee pef peg peo pep per pes pfd pfe pff pfg pfo pfp pfr pfs pgd pge pgf pgg pgo pgp pgr pgs pod poe pof pog poo pop por pos ppd ppe ppf ppg ppo ppp ppr pps prd pre prf prg pro prp prr prs ps- psd pse psf psg pso psp psr pss rdd rde rdf rdg rdo rdp rdr rds re- red ree ref reg reo rep rer res rfd rfe rff rfg rfo rfp rfr rfs rgd rge rgf rgg rgo rgp rgr rgs rod roe rof rog roo rop ror ros rpd rpe rpf rpg rpo rpp rpr rps rrd rrf rrg rrp rrr rrs rsd rse rsf rsg rso rsp rsr rss sdd sde sdf sdg sdo sdp sdr sds se- sed see sef seg seo sep ser ses sfd sfe sff sfg sfo sfp sfr sfs sgd sge sgf sgg sgo sgp sgr sgs sod soe sof sog soo sop sor sos spd spe spf spg spo spp spr sps sr- srd sre srf srg sro srp srr srs ss- ssd sse ssf ssg sso ssp ssr sss