-er -ey ddd dde ddf ddk ddo ddr ddu ddy de- ded dee def dek deo der deu dey dfd dfe dff dfk dfo dfr dfu dke dkk dko dkr dku dod doe dof dok doo dor dou doy drd dre drk dro drr dru dry dud due duf duk duo dur duy dy- dyd dye dyk dyo dyr dyu dyy ed- edd ede edf edk edo edr edu edy eed eee eef eek eeo eer eey ef- efd efe eff efo efr ekd eke ekf eko ekr eku eky eo- eod eoe eof eok eoo eor eou erd ere erf erk ero err eru ery eu- eud eue euf eur eyd eye eyo eyr fdd fde fdf fdk fdo fdr fdu fed fee fef fek feo fer feu fey ffd ffe fff ffk ffo ffr ffu ffy fkf fkk foe fof fok foo for fou foy frd fre frf frk fro frr fru fry fud fue fuf fuk fuo fur fuu fy- fye fyk fyo kde kdf kdk kdo kdr kdu kdy ke- ked kee kef kek keo ker key kfd kff kfo kfu kke kkk kkr kku kky kod koe kof kok koo kor kou koy krd krf krk kro krr kru kry kud kue kuk kur kuu kuy kyd kye kyo kyr kyu odd ode odf odo odr odu oed oee oef oeo oer oey of- ofd ofe off ofo ofr ofu okd oke okk oko okr oku oo- ood oof ook ooo oor or- ord ore orf ork oro orr oru ory ou- oud oue ouf ouk ouo our oyd oye oyo rdd rde rdf rdo rdr rdu rdy re- red ree ref rek reo rer reu rey rfd rfe rff rfk rfo rfr rfu rke rkf rkk rko rku rky rod roe rof rok roo ror rou roy rrd rrf rrk rrr rru rud rue ruf ruk ruo rur ruu ruy ry- ryd rye ryf ryk ryo ryr ryu ryy udd ude udf udk udo udr udu ued uee uef uer uey ufd ufe uff ufo ufr ufu uke ukf ukk ukr uku uod uoe uok uoo uor ur- urd ure urf urk uro urr uru ury uue uur uuu uyo uyu yde ydo ydy yed yee yef yek yeo yer yey yfd yfe yff yfr yfu ykk yod yoe yof yok yoo yor you yoy yre yrf yro yru yud yue yuk yuo yur yuu yuy yye yyf yyu yyy