-er ddd dde ddk ddm ddo ddr de- ded dee dek dem deo der dke dkk dkm dko dkr dmd dme dmk dmm dmo dmr dod doe dok dom doo dor drd dre drk drm dro drr ed- edd ede edk edm edo edr eed eee eek eem eeo eer ekd eke eko ekr em- emd eme emk emm emo emr eo- eod eoe eok eom eoo eor erd ere erk erm ero err kde kdk kdm kdo kdr ke- ked kee kek kem keo ker kke kkk kkm kkr kmd kme kmk kmm kmo kod koe kok kom koo kor krd krk kro krr m-o m-r mdd mde mdk mdm mdo mdr med mee mek mem meo mer mkd mke mkk mkm mko mkr mmd mme mmk mmm mmo mmr mod moe mok mom moo mor mrd mre mrk mrm mro mrr odd ode odm odo odr oed oee oem oeo oer okd oke okk oko okr om- omd ome omm omo omr oo- ood ook oom ooo oor or- ord ore ork orm oro orr rdd rde rdm rdo rdr re- red ree rek rem reo rer rke rkk rkm rko rmd rme rmm rmo rmr rod roe rok rom roo ror rrd rrk rrm rrr