ddd ddi ddp ddr dds di- did dii dip dir dis div dpd dpi dpp dpr dps dpv drd dri drp drr drs drv dsd dsi dsp dsr dss dsv dvd dvi dvp dvr dvs i-d i-v idd idi idp idr ids idv iid iii iip iir iis ipd ipi ipp ipr ips ipv ir- ird iri irp irr irs irv is- isd isi isp isr iss isv ivd ivi ivp ivr ivs ivv p-p pdd pdi pdp pdr pds pdv pid pii pip pir pis piv ppd ppi ppp ppr pps ppv prd pri prp prr prs prv ps- psd psi psp psr pss psv pvd pvi pvp pvr pvs pvv rdd rdi rdp rdr rds rdv rid rii rip rir ris riv rpd rpi rpp rpr rps rpv rrd rri rrp rrr rrs rsd rsi rsp rsr rss rsv rvd rvi rvp rvr rvs rvv sdd sdi sdp sdr sds sdv sid sii sip sir sis siv spd spi spp spr sps spv sr- srd sri srp srr srs srv ss- ssd ssi ssp ssr sss ssv svd svi svp svr svs svv vdd vdi vdp vdr vds vdv vi- vid vii vip vir vis viv vpd vpi vpp vpr vps vrd vri vrp vrr vrs vsd vsi vsp vsr vss vsv vvi vvr vvs vvv