ddd ddi ddo dds di- did dii dio dis div dod doi doo dos dov dsd dsi dso dss dsv dvd dvi dvs i-d i-v idd idi ido ids idv iid iii iio iis io- iod ioi ioo ios iov is- isd isi iso iss isv ivd ivi ivo ivs ivv o-i odd odi odo ods odv oid oii oio ois oiv oo- ood ooi ooo oos oov os- osd osi oso oss osv ov- ovd ovi ovo ovs ovv sdd sdi sdo sds sdv sid sii sio sis siv sod soi soo sos sov ss- ssd ssi sso sss ssv svd svi svo svs svv vdd vdi vdo vds vdv vi- vid vii vio vis viv vod voi voo vos vov vsd vsi vso vss vsv vvi vvo vvs vvv