-er ddd dde ddf ddn ddo ddp ddr dds de- ded dee def den deo dep der des dfd dfe dff dfn dfo dfp dfr dfs dnd dne dnf dnn dno dnp dnr dns dod doe dof don doo dop dor dos dpd dpe dpf dpn dpo dpp dpr dps drd dre drn dro drp drr drs dsd dse dsf dsn dso dsp dsr dss ed- edd ede edf edn edo edp edr eds eed eee eef een eeo eep eer ees ef- efd efe eff efo efp efr efs en- end ene enf enn eno enp enr ens eo- eod eoe eof eon eoo eop eor eos ep- epd epe epf epn epo epp epr eps erd ere erf ern ero erp err ers es- esd ese esf esn eso esp esr ess fdd fde fdf fdn fdo fdp fdr fds fed fee fef fen feo fep fer fes ffd ffe fff ffn ffo ffp ffr ffs fnd fne fnf fnn fnp fnr fns foe fof fon foo fop for fos fpd fpe fpn fpo fpp fpr fps frd fre frf frn fro frp frr frs fsd fse fsf fsn fso fsp fsr fss ndd nde ndf ndn ndo ndp ndr nds ne- ned nee nef nen neo nep ner nes nfd nfe nff nfn nfo nfp nfr nfs nne nnf nnn nno nnp nns no- nod noe nof non noo nop nor nos npd npe npf npn npo npp npr nps nrd nre nrf nrn nro nrp nrr nrs nsd nse nsf nsn nso nsp nsr nss odd ode odf odn odo odp odr ods oed oee oef oen oeo oep oer oes of- ofd ofe off ofn ofo ofp ofr ofs on- ond one onf onn ono onp onr ons oo- ood oof oon ooo oop oor oos op- opd ope opf opn opo opp opr ops or- ord ore orf orn oro orp orr ors os- osd ose osf osn oso osp osr oss p-p pdd pde pdf pdn pdo pdp pdr pds ped pee pef pen peo pep per pes pfd pfe pff pfn pfo pfp pfr pfs pn- pnd pne pnf pnn pno pnp pnr pns pod poe pof pon poo pop por pos ppd ppe ppf ppn ppo ppp ppr pps prd pre prf prn pro prp prr prs ps- psd pse psf psn pso psp psr pss rdd rde rdf rdn rdo rdp rdr rds re- red ree ref ren reo rep rer res rfd rfe rff rfn rfo rfp rfr rfs rnd rnn rno rnp rnr rns rod roe rof ron roo rop ror ros rpd rpe rpf rpn rpo rpp rpr rps rrd rrf rrn rrp rrr rrs rsd rse rsf rsn rso rsp rsr rss sdd sde sdf sdn sdo sdp sdr sds se- sed see sef sen seo sep ser ses sfd sfe sff sfn sfo sfp sfr sfs snd sne snf snn sno snp snr sns sod soe sof son soo sop sor sos spd spe spf spn spo spp spr sps sr- srd sre srf srn sro srp srr srs ss- ssd sse ssf ssn sso ssp ssr sss