ddd ddi ddo ddr dds di- did dii dio dir dis div dod doi doo dor dos dov drd dri dro drr drs drv dsd dsi dso dsr dss dsv dvd dvi dvr dvs i-d i-v idd idi ido idr ids idv iid iii iio iir iis io- iod ioi ioo ior ios iov ir- ird iri iro irr irs irv is- isd isi iso isr iss isv ivd ivi ivo ivr ivs ivv o-i odd odi odo odr ods odv oid oii oio oir ois oiv oo- ood ooi ooo oor oos oov or- ord ori oro orr ors orv os- osd osi oso osr oss osv ov- ovd ovi ovo ovs ovv rdd rdi rdo rdr rds rdv rid rii rio rir ris riv rod roi roo ror ros rov rrd rri rrr rrs rsd rsi rso rsr rss rsv rvd rvi rvo rvr rvs rvv sdd sdi sdo sdr sds sdv sid sii sio sir sis siv sod soi soo sor sos sov sr- srd sri sro srr srs srv ss- ssd ssi sso ssr sss ssv svd svi svo svr svs svv vdd vdi vdo vdr vds vdv vi- vid vii vio vir vis viv vod voi voo vor vos vov vrd vri vrr vrs vsd vsi vso vsr vss vsv vvi vvo vvr vvs vvv