-er ddd dde ddk ddm ddo ddp ddr dds de- ded dee dek dem deo dep der des dke dkk dkm dko dkp dkr dks dmd dme dmk dmm dmo dmp dmr dms dod doe dok dom doo dop dor dos dpd dpe dpk dpm dpo dpp dpr dps drd dre drk drm dro drp drr drs dsd dse dsk dsm dso dsp dsr dss ed- edd ede edk edm edo edp edr eds eed eee eek eem eeo eep eer ees ekd eke eko ekp ekr eks em- emd eme emk emm emo emp emr ems eo- eod eoe eok eom eoo eop eor eos ep- epd epe epm epo epp epr eps erd ere erk erm ero erp err ers es- esd ese esk esm eso esp esr ess kde kdk kdm kdo kdp kdr kds ke- ked kee kek kem keo kep ker kes kke kkk kkm kkp kkr kks kmd kme kmk kmm kmo kmp kms kod koe kok kom koo kop kor kos kpd kpe kpk kpm kpo kpp kpr kps krd krk kro krp krr krs ksd kse ksk ksm kso ksp ksr kss m-o m-r mdd mde mdk mdm mdo mdp mdr mds med mee mek mem meo mep mer mes mkd mke mkk mkm mko mkp mkr mks mmd mme mmk mmm mmo mmp mmr mms mod moe mok mom moo mop mor mos mpd mpe mpk mpm mpo mpp mpr mps mrd mre mrk mrm mro mrp mrr mrs msd mse msk msm mso msp msr mss odd ode odm odo odp odr ods oed oee oem oeo oep oer oes okd oke okk oko okp okr oks om- omd ome omm omo omp omr oms oo- ood ook oom ooo oop oor oos op- opd ope opk opm opo opp opr ops or- ord ore ork orm oro orp orr ors os- osd ose osk osm oso osp osr oss p-p pdd pde pdk pdm pdo pdp pdr pds ped pee pek pem peo pep per pes pkd pke pkm pko pkp pkr pks pmd pme pmk pmm pmo pmp pmr pms pod poe pok pom poo pop por pos ppd ppe ppk ppm ppo ppp ppr pps prd pre prk prm pro prp prr prs ps- psd pse psk psm pso psp psr pss rdd rde rdm rdo rdp rdr rds re- red ree rek rem reo rep rer res rke rkk rkm rko rkp rks rmd rme rmm rmo rmp rmr rms rod roe rok rom roo rop ror ros rpd rpe rpk rpm rpo rpp rpr rps rrd rrk rrm rrp rrr rrs rsd rse rsk rsm rso rsp rsr rss sdd sde sdk sdm sdo sdp sdr sds se- sed see sek sem seo sep ser ses sk- skd ske skk skm sko skp skr sks smd sme smk smm smo smp smr sms sod soe sok som soo sop sor sos spd spe spk spm spo spp spr sps sr- srd sre srk srm sro srp srr srs ss- ssd sse ssk ssm sso ssp ssr sss