ddd ddi ddo dds ddt di- did dii dio dis dit dod doi doo dos dot dsd dsi dso dss dst dtd dti dto dts dtt i-d idd idi ido ids idt iid iii iio iis iit io- iod ioi ioo ios iot is- isd isi iso iss ist itd iti ito its itt 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 sdd sdi sdo sds sdt sid sii sio sis sit sod soi soo sos sot ss- ssd ssi sso sss sst std sti sto sts stt tdd tdi tdo tds tdt tid tii tio tis tit to- tod toi too tos tot tsd tsi tso tss tst ttd tti tto tts ttt