ddd ddi ddo dds ddt di- did dii dio dis dit div dod doi doo dos dot dov dsd dsi dso dss dst dsv dtd dti dto dts dtt dtv dvd dvi dvs dvt i-d i-v idd idi ido ids idt idv iid iii iio iis iit io- iod ioi ioo ios iot iov is- isd isi iso iss ist isv itd iti ito its itt itv ivd ivi ivo ivs ivt ivv o-i odd odi odo ods odt odv oid oii oio ois oit oiv oo- ood ooi ooo oos oot oov os- osd osi oso oss ost osv ot- otd oti oto ots ott otv ov- ovd ovi ovo ovs ovv sdd sdi sdo sds sdt sdv sid sii sio sis sit siv sod soi soo sos sot sov ss- ssd ssi sso sss sst ssv std sti sto sts stt stv svd svi svo svs svt svv tdd tdi tdo tds tdt tdv tid tii tio tis tit tiv to- tod toi too tos tot tov tsd tsi tso tss tst tsv ttd tti tto tts ttt ttv tvd tvi tvo tvs tvt vdd vdi vdo vds vdt vdv vi- vid vii vio vis vit viv vod voi voo vos vot vov vsd vsi vso vss vst vsv vti vto vts vtt vtv vvi vvo vvs vvt vvv