ddd ddi ddo dds ddt ddy di- did dii dio dis dit diy dod doi doo dos dot doy dsd dsi dso dss dst dsy dtd dti dto dts dtt dty dy- dyd dyo dys dyy i-d idd idi ido ids idt idy iid iii iio iis iit io- iod ioi ioo ios iot is- isd isi iso iss ist isy itd iti ito its itt ity iyo iys iyt iyy o-i odd odi odo ods odt oid oii oio ois oit oo- ood ooi ooo oos oot os- osd osi oso oss ost ot- otd oti oto ots ott oyd oyi oyo oys sdd sdi sdo sds sdt sdy sid sii sio sis sit sod soi soo sos sot soy ss- ssd ssi sso sss sst std sti sto sts stt sty sy- syd syi sys syt tdd tdi tdo tds tdt tdy tid tii tio tis tit tiy to- tod toi too tos tot toy tsd tsi tso tss tst tsy ttd tti tto tts ttt tty tyd tyo tys tyt ydo yds ydt ydy yid yii yio yis yit yod yoi yoo yos yot yoy ysi yso yss yst ysy ytd yto yts ytt yys yyt yyy