-er ddd dde ddn ddo ddp ddr dds ddt de- ded dee den deo dep der des det dnd dne dnn dno dnp dnr dns dnt dod doe don doo dop dor dos dot dpd dpe dpn dpo dpp dpr dps dpt drd dre drn dro drp drr drs drt dsd dse dsn dso dsp dsr dss dst dtd dte dtn dto dtp dtr dts dtt ed- edd ede edn edo edp edr eds edt eed eee een eeo eep eer ees eet en- end ene enn eno enp enr ens ent eo- eod eoe eon eoo eop eor eos eot ep- epd epe epn epo epp epr eps ept erd ere ern ero erp err ers ert es- esd ese esn eso esp esr ess est etd ete etn eto etp etr ets ett ndd nde ndn ndo ndp ndr nds ndt ne- ned nee nen neo nep ner nes net nne nnn nno nnp nns nnt no- nod noe non noo nop nor nos not npd npe npn npo npp npr nps npt nrd nre nrn nro nrp nrr nrs nrt nsd nse nsn nso nsp nsr nss nst ntd nte ntn nto ntp ntr nts ntt odd ode odn odo odp odr ods odt oed oee oen oeo oep oer oes oet on- ond one onn ono onp onr ons ont oo- ood oon ooo oop oor oos oot op- opd ope opn opo opp opr ops opt or- ord ore orn oro orp orr ors ort os- osd ose osn oso osp osr oss ost ot- otd ote otn oto otp otr ots ott p-p pdd pde pdn pdo pdp pdr pds pdt ped pee pen peo pep per pes pet pn- pnd pne pnn pno pnp pnr pns pnt pod poe pon poo pop por pos pot ppd ppe ppn ppo ppp ppr pps ppt prd pre prn pro prp prr prs prt ps- psd pse psn pso psp psr pss pst pt- ptd pte ptn pto ptp ptr pts ptt rdd rde rdn rdo rdp rdr rds rdt re- red ree ren reo rep rer res ret rnd rnn rno rnp rnr rns rnt rod roe ron roo rop ror ros rot rpd rpe rpn rpo rpp rpr rps rpt rrd rrn rrp rrr rrs rrt rsd rse rsn rso rsp rsr rss rst rtd rte rtn rto rtp rtr rts rtt sdd sde sdn sdo sdp sdr sds sdt se- sed see sen seo sep ser ses set snd sne snn sno snp snr sns snt sod soe son soo sop sor sos sot spd spe spn spo spp spr sps spt sr- srd sre srn sro srp srr srs srt ss- ssd sse ssn sso ssp ssr sss sst std ste stn sto stp str sts stt tdd tde tdn tdo tdp tdr tds tdt te- ted tee ten teo tep ter tes tet tnd tne tnn tno tnp tnr tns tnt to- tod toe ton too top tor tos tot tpd tpe tpn tpo tpp tpr tps tpt trd tre trn tro trp trr trs trt tsd tse tsn tso tsp tsr tss tst ttd tte ttn tto ttp ttr tts ttt