ddd ddi ddr dds di- did dii dir dis div drd dri drr drs drv dsd dsi dsr dss dsv dvd dvi dvr dvs i-d i-v idd idi idr ids idv iid iii iir iis ir- ird iri irr irs irv is- isd isi isr iss isv ivd ivi ivr ivs ivv rdd rdi rdr rds rdv rid rii rir ris riv rrd rri rrr rrs rsd rsi rsr rss rsv rvd rvi rvr rvs rvv sdd sdi sdr sds sdv sid sii sir sis siv sr- srd sri srr srs srv ss- ssd ssi ssr sss ssv svd svi svr svs svv vdd vdi vdr vds vdv vi- vid vii vir vis viv vrd vri vrr vrs vsd vsi vsr vss vsv vvi vvr vvs vvv