ddd ddf ddp dds ddt dfd dff dfp dfs dft dfv dpd dpf dpp dps dpt dpv dsd dsf dsp dss dst dsv dtd dtf dtp dts dtt dtv dvd dvp dvs dvt fdd fdf fdp fds fdt ffd fff ffp ffs fft ffv fpd fpp fps fpt fpv fsd fsf fsp fss fst fsv ftd ftf ftp fts ftt ftv fvd fvp fvt p-p pdd pdf pdp pds pdt pdv pfd pff pfp pfs pft pfv ppd ppf ppp pps ppt ppv ps- psd psf psp pss pst psv pt- ptd ptf ptp pts ptt ptv pvd pvf pvp pvs pvt pvv sdd sdf sdp sds sdt sdv sfd sff sfp sfs sft sfv spd spf spp sps spt spv ss- ssd ssf ssp sss sst ssv std stf stp sts stt stv svd svf svp svs svt svv tdd tdf tdp tds tdt tdv tfd tff tfp tfs tft tpd tpf tpp tps tpt tpv tsd tsf tsp tss tst tsv ttd ttf ttp tts ttt ttv tvd tvf tvp tvs tvt vdd vdf vdp vds vdt vdv vfd vff vfp vfs vft vfv vpd vpf vpp vps vpt vsd vsf vsp vss vst vsv vts vtt vtv vvs vvt vvv