-er ddd dde ddk ddm ddo ddr dds ddt de- ded dee dek dem deo der des det dke dkk dkm dko dkr dks dkt dmd dme dmk dmm dmo dmr dms dmt dod doe dok dom doo dor dos dot drd dre drk drm dro drr drs drt dsd dse dsk dsm dso dsr dss dst dtd dte dtk dtm dto dtr dts dtt ed- edd ede edk edm edo edr eds edt eed eee eek eem eeo eer ees eet ekd eke eko ekr eks ekt em- emd eme emk emm emo emr ems emt eo- eod eoe eok eom eoo eor eos eot erd ere erk erm ero err ers ert es- esd ese esk esm eso esr ess est etd ete etk etm eto etr ets ett k-t kde kdk kdm kdo kdr kds kdt ke- ked kee kek kem keo ker kes ket kke kkk kkm kkr kks kkt kmd kme kmk kmm kmo kms kmt kod koe kok kom koo kor kos kot krd krk kro krr krs krt ksd kse ksk ksm kso ksr kss kst kte ktk ktm kto ktr kts ktt m-o m-r mdd mde mdk mdm mdo mdr mds mdt med mee mek mem meo mer mes met mkd mke mkk mkm mko mkr mks mkt mmd mme mmk mmm mmo mmr mms mmt mod moe mok mom moo mor mos mot mrd mre mrk mrm mro mrr mrs mrt msd mse msk msm mso msr mss mst mtd mte mtk mtm mto mtr mts mtt odd ode odm odo odr ods odt oed oee oem oeo oer oes oet okd oke okk oko okr oks om- omd ome omm omo omr oms omt oo- ood ook oom ooo oor oos oot or- ord ore ork orm oro orr ors ort os- osd ose osk osm oso osr oss ost ot- otd ote otk otm oto otr ots ott rdd rde rdm rdo rdr rds rdt re- red ree rek rem reo rer res ret rke rkk rkm rko rks rkt rmd rme rmm rmo rmr rms rmt rod roe rok rom roo ror ros rot rrd rrk rrm rrr rrs rrt rsd rse rsk rsm rso rsr rss rst rtd rte rtk rtm rto rtr rts rtt sdd sde sdk sdm sdo sdr sds sdt se- sed see sek sem seo ser ses set sk- skd ske skk skm sko skr sks skt smd sme smk smm smo smr sms smt sod soe sok som soo sor sos sot sr- srd sre srk srm sro srr srs srt ss- ssd sse ssk ssm sso ssr sss sst std ste stk stm sto str sts stt tdd tde tdk tdm tdo tdr tds tdt te- ted tee tek tem teo ter tes tet tke tkk tkm tko tkr tks tkt tmd tme tmk tmm tmo tmr tms tmt to- tod toe tok tom too tor tos tot trd tre trk trm tro trr trs trt tsd tse tsk tsm tso tsr tss tst ttd tte ttk ttm tto ttr tts ttt