-er ddd dde ddi ddk ddm ddo ddr de- ded dee dei dek dem deo der di- did die dii dik dim dio dir dke dki dkk dkm dko dkr dmd dme dmi dmk dmm dmo dmr dod doe doi dok dom doo dor drd dre dri drk drm dro drr ed- edd ede edi edk edm edo edr eed eee eek eem eeo eer eid eie eii eik eim eio eir ekd eke eki eko ekr em- emd eme emi emk emm emo emr eo- eod eoe eoi eok eom eoo eor erd ere eri erk erm ero err i-d idd ide idi idk idm ido idr ie- ied iee iei iek iem ier iid iie iii iim iio iir ike iki ikk iko ikr im- imd ime imi imm imo io- iod ioe ioi iom ioo ior ir- ird ire iri irk irm iro irr kde kdk kdm kdo kdr ke- ked kee kei kek kem keo ker kid kie kii kik kim kio kir kke kki kkk kkm kkr kmd kme kmi kmk kmm kmo kod koe koi kok kom koo kor krd kri krk kro krr m-o m-r mdd mde mdi mdk mdm mdo mdr med mee mei mek mem meo mer mi- mid mie mii mik mim mio mir mkd mke mkk mkm mko mkr mmd mme mmi mmk mmm mmo mmr mod moe moi mok mom moo mor mrd mre mri mrk mrm mro mrr o-i odd ode odi odm odo odr oed oee oei oem oeo oer oid oie oii oik oim oio oir okd oke oki okk oko okr om- omd ome omi omm omo omr oo- ood ooi ook oom ooo oor or- ord ore ori ork orm oro orr rdd rde rdi rdm rdo rdr re- red ree rei rek rem reo rer rid rie rii rik rim rio rir rke rkk rkm rko rmd rme rmi rmm rmo rmr rod roe roi rok rom roo ror rrd rri rrk rrm rrr