-er ddd dde ddf ddk ddm ddo ddp ddr dds de- ded dee def dek dem deo dep der des dfd dfe dff dfk dfm dfo dfp dfr dfs dke dkk dkm dko dkp dkr dks dmd dme dmf dmk dmm dmo dmp dmr dms dod doe dof dok dom doo dop dor dos dpd dpe dpf dpk dpm dpo dpp dpr dps drd dre drk drm dro drp drr drs dsd dse dsf dsk dsm dso dsp dsr dss ed- edd ede edf edk edm edo edp edr eds eed eee eef eek eem eeo eep eer ees ef- efd efe eff efm efo efp efr efs ekd eke ekf eko ekp ekr eks em- emd eme emf emk emm emo emp emr ems eo- eod eoe eof eok eom eoo eop eor eos ep- epd epe epf epm epo epp epr eps erd ere erf erk erm ero erp err ers es- esd ese esf esk esm eso esp esr ess fdd fde fdf fdk fdm fdo fdp fdr fds fed fee fef fek fem feo fep fer fes ffd ffe fff ffk ffm ffo ffp ffr ffs fkf fkk fkm fkp fmd fme fmf fmm fmo fmp fmr fms foe fof fok fom foo fop for fos fpd fpe fpk fpm fpo fpp fpr fps frd fre frf frk frm fro frp frr frs fsd fse fsf fsk fsm fso fsp fsr fss kde kdf kdk kdm kdo kdp kdr kds ke- ked kee kef kek kem keo kep ker kes kfd kff kfm kfo kfs kke kkk kkm kkp kkr kks kmd kme kmf kmk kmm kmo kmp kms kod koe kof kok kom koo kop kor kos kpd kpe kpf kpk kpm kpo kpp kpr kps krd krf krk kro krp krr krs ksd kse ksf ksk ksm kso ksp ksr kss m-f m-o m-r mdd mde mdf mdk mdm mdo mdp mdr mds med mee mef mek mem meo mep mer mes mfd mfe mff mfm mfo mfp mfr mfs mkd mke mkk mkm mko mkp mkr mks mmd mme mmf mmk mmm mmo mmp mmr mms mod moe mof mok mom moo mop mor mos mpd mpe mpf mpk mpm mpo mpp mpr mps mrd mre mrf mrk mrm mro mrp mrr mrs msd mse msf msk msm mso msp msr mss odd ode odf odm odo odp odr ods oed oee oef oem oeo oep oer oes of- ofd ofe off ofm ofo ofp ofr ofs okd oke okk oko okp okr oks om- omd ome omf omm omo omp omr oms oo- ood oof ook oom ooo oop oor oos op- opd ope opf opk opm opo opp opr ops or- ord ore orf ork orm oro orp orr ors os- osd ose osf osk osm oso osp osr oss p-p pdd pde pdf pdk pdm pdo pdp pdr pds ped pee pef pek pem peo pep per pes pfd pfe pff pfk pfm pfo pfp pfr pfs pkd pke pkf pkm pko pkp pkr pks pmd pme pmf pmk pmm pmo pmp pmr pms pod poe pof pok pom poo pop por pos ppd ppe ppf ppk ppm ppo ppp ppr pps prd pre prf prk prm pro prp prr prs ps- psd pse psf psk psm pso psp psr pss rdd rde rdf rdm rdo rdp rdr rds re- red ree ref rek rem reo rep rer res rfd rfe rff rfk rfm rfo rfp rfr rfs rke rkf rkk rkm rko rkp rks rmd rme rmf rmm rmo rmp rmr rms rod roe rof rok rom roo rop ror ros rpd rpe rpf rpk rpm rpo rpp rpr rps rrd rrf rrk rrm rrp rrr rrs rsd rse rsf rsk rsm rso rsp rsr rss sdd sde sdf sdk sdm sdo sdp sdr sds se- sed see sef sek sem seo sep ser ses sfd sfe sff sfk sfm sfo sfp sfr sfs sk- skd ske skf skk skm sko skp skr sks smd sme smf smk smm smo smp smr sms sod soe sof sok som soo sop sor sos spd spe spf spk spm spo spp spr sps sr- srd sre srf srk srm sro srp srr srs ss- ssd sse ssf ssk ssm sso ssp ssr sss