-er -ey ddd dde ddf ddo ddr ddt ddy de- ded dee def deo der det dey dfd dfe dff dfo dfr dft dod doe dof doo dor dot doy drd dre dro drr drt dry dtd dte dtf dto dtr dtt dty dy- dyd dye dyo dyr dyy ed- edd ede edf edo edr edt edy eed eee eef eeo eer eet eey ef- efd efe eff efo efr eft eo- eod eoe eof eoo eor eot erd ere erf ero err ert ery etd ete etf eto etr ett ety eyd eye eyo eyr eyt fdd fde fdf fdo fdr fdt fed fee fef feo fer fet fey ffd ffe fff ffo ffr fft ffy foe fof foo for fot foy frd fre frf fro frr frt fry ftd fte ftf fto ftr ftt fty fy- fye fyo odd ode odf odo odr odt oed oee oef oeo oer oet oey of- ofd ofe off ofo ofr oft oo- ood oof ooo oor oot or- ord ore orf oro orr ort ory ot- otd ote otf oto otr ott oyd oye oyo rdd rde rdf rdo rdr rdt rdy re- red ree ref reo rer ret rey rfd rfe rff rfo rfr rft rod roe rof roo ror rot roy rrd rrf rrr rrt rtd rte rtf rto rtr rtt rty ry- ryd rye ryf ryo ryr ryy tdd tde tdf tdo tdr tdt tdy te- ted tee tef teo ter tet tey tfd tfe tff tfo tfr tft to- tod toe tof too tor tot toy trd tre trf tro trr trt try ttd tte ttf tto ttr ttt tty tyd tye tyf tyo tyr tyt yde ydo ydt ydy yed yee yef yeo yer yet yey yfd yfe yff yfr yft yod yoe yof yoo yor yot yoy yre yrf yro yrt ytd yte ytf yto ytr ytt yye yyf yyt yyy