-ey ddd dde ddf ddo ddt ddy de- ded dee def deo det dey dfd dfe dff dfo dft dod doe dof doo dot doy dtd dte dtf dto dtt dty dy- dyd dye dyo dyy ed- edd ede edf edo edt edy eed eee eef eeo eet eey ef- efd efe eff efo eft eo- eod eoe eof eoo eot etd ete etf eto ett ety eyd eye eyo eyt fdd fde fdf fdo fdt fed fee fef feo fet fey ffd ffe fff ffo fft ffy foe fof foo fot foy ftd fte ftf fto ftt fty fy- fye fyo odd ode odf odo odt oed oee oef oeo oet oey of- ofd ofe off ofo oft oo- ood oof ooo oot ot- otd ote otf oto ott oyd oye oyo tdd tde tdf tdo tdt tdy te- ted tee tef teo tet tey tfd tfe tff tfo tft to- tod toe tof too tot toy ttd tte ttf tto ttt tty tyd tye tyf tyo tyt yde ydo ydt ydy yed yee yef yeo yet yey yfd yfe yff yft yod yoe yof yoo yot yoy ytd yte ytf yto ytt yye yyf yyt yyy