ddd ddf ddi ddo ddt dfd dff dfi dfo dft di- did dif dii dio dit dod dof doi doo dot dtd dtf dti dto dtt fdd fdf fdi fdo fdt ffd fff ffi ffo fft fid fif fii fit fof foi foo fot ftd ftf fti fto ftt i-d i-f idd idf idi ido idt ifd iff ifi ifo ift iid iif iii iio iit io- iod iof ioi ioo iot itd itf iti ito itt o-i odd odf odi odo odt of- ofd off ofi ofo oft oid oif oii oio oit oo- ood oof ooi ooo oot ot- otd otf oti oto ott tdd tdf tdi tdo tdt tfd tff tfi tfo tft tid tif tii tio tit to- tod tof toi too tot ttd ttf tti tto ttt