-er ddd dde ddi ddm ddo ddr de- ded dee dei dem deo der di- did die dii dim dio dir dmd dme dmi dmm dmo dmr dod doe doi dom doo dor drd dre dri drm dro drr ed- edd ede edi edm edo edr eed eee eem eeo eer eid eie eii eim eio eir em- emd eme emi emm emo emr eo- eod eoe eoi eom eoo eor erd ere eri erm ero err i-d idd ide idi idm ido idr ie- ied iee iei iem ier iid iie iii iim iio iir im- imd ime imi imm imo io- iod ioe ioi iom ioo ior ir- ird ire iri irm iro irr m-o m-r mdd mde mdi mdm mdo mdr med mee mei mem meo mer mi- mid mie mii mim mio mir mmd mme mmi mmm mmo mmr mod moe moi mom moo mor mrd mre mri mrm mro mrr o-i odd ode odi odm odo odr oed oee oei oem oeo oer oid oie oii oim oio oir om- omd ome omi omm omo omr oo- ood ooi oom ooo oor or- ord ore ori orm oro orr rdd rde rdi rdm rdo rdr re- red ree rei rem reo rer rid rie rii rim rio rir rmd rme rmi rmm rmo rmr rod roe roi rom roo ror rrd rri rrm rrr