-er ddd dde ddm ddn ddo ddp ddr dds de- ded dee dem den deo dep der des dmd dme dmm dmn dmo dmp dmr dms dnd dne dnm dnn dno dnp dnr dns dod doe dom don doo dop dor dos dpd dpe dpm dpn dpo dpp dpr dps drd dre drm drn dro drp drr drs dsd dse dsm dsn dso dsp dsr dss ed- edd ede edm edn edo edp edr eds eed eee eem een eeo eep eer ees em- emd eme emm emn emo emp emr ems en- end ene enm enn eno enp enr ens eo- eod eoe eom eon eoo eop eor eos ep- epd epe epm epn epo epp epr eps erd ere erm ern ero erp err ers es- esd ese esm esn eso esp esr ess m-o m-r mdd mde mdm mdn mdo mdp mdr mds med mee mem men meo mep mer mes mmd mme mmm mmn mmo mmp mmr mms mne mnm mnn mno mnp mnr mns mod moe mom mon moo mop mor mos mpd mpe mpm mpn mpo mpp mpr mps mrd mre mrm mrn mro mrp mrr mrs msd mse msm msn mso msp msr mss ndd nde ndm ndn ndo ndp ndr nds ne- ned nee nem nen neo nep ner nes nmd nme nmm nmn nmo nmp nmr nms nne nnm nnn nno nnp nns no- nod noe nom non noo nop nor nos npd npe npm npn npo npp npr nps nrd nre nrm nrn nro nrp nrr nrs nsd nse nsm nsn nso nsp nsr nss odd ode odm odn odo odp odr ods oed oee oem oen oeo oep oer oes om- omd ome omm omn omo omp omr oms on- ond one onn ono onp onr ons oo- ood oom oon ooo oop oor oos op- opd ope opm opn opo opp opr ops or- ord ore orm orn oro orp orr ors os- osd ose osm osn oso osp osr oss p-p pdd pde pdm pdn pdo pdp pdr pds ped pee pem pen peo pep per pes pmd pme pmm pmn pmo pmp pmr pms pn- pnd pne pnm pnn pno pnp pnr pns pod poe pom pon poo pop por pos ppd ppe ppm ppn ppo ppp ppr pps prd pre prm prn pro prp prr prs ps- psd pse psm psn pso psp psr pss rdd rde rdm rdn rdo rdp rdr rds re- red ree rem ren reo rep rer res rmd rme rmm rmn rmo rmp rmr rms rnd rnm rnn rno rnp rnr rns rod roe rom ron roo rop ror ros rpd rpe rpm rpn rpo rpp rpr rps rrd rrm rrn rrp rrr rrs rsd rse rsm rsn rso rsp rsr rss sdd sde sdm sdn sdo sdp sdr sds se- sed see sem sen seo sep ser ses smd sme smm smn smo smp smr sms snd sne snm snn sno snp snr sns sod soe som son soo sop sor sos spd spe spm spn spo spp spr sps sr- srd sre srm srn sro srp srr srs ss- ssd sse ssm ssn sso ssp ssr sss