-er ddd dde ddm ddo ddq ddr ddu de- ded dee dem deo deq der deu dmd dme dmm dmo dmr dmu dod doe dom doo doq dor dou dqe drd dre drm dro drq drr dru dud due dum duo dur ed- edd ede edm edo edr edu eed eee eem eeo eer em- emd eme emm emo emr emu eo- eod eoe eom eoo eoq eor eou eqe eqq equ erd ere erm ero erq err eru eu- eud eue eur m-o m-r mdd mde mdm mdo mdq mdr mdu med mee mem meo meq mer meu mmd mme mmm mmo mmr mmu mod moe mom moo mor mou mqr mrd mre mrm mro mrq mrr mru mud mue mum mur muu odd ode odm odo odr odu oed oee oem oeo oer om- omd ome omm omo omr omu oo- ood oom ooo oor oqo or- ord ore orm oro orr oru ou- oud oue oum ouo our qdr qed qee qem qeo qme qmr qmu qom qoo qor qqq qqu qre qrm qru qu- qud que qum quo qur rdd rde rdm rdo rdr rdu re- red ree rem reo req rer reu rmd rme rmm rmo rmq rmr rod roe rom roo ror rou rqm rrd rrm rrq rrr rru rud rue rum ruo rur ruu udd ude udm udo udr udu ued uee uem uer um- umd ume umm umo umr umu uod uoe uom uoo uor ur- urd ure urm uro urr uru uue uum uur uuu