d-tv dddd ddps ddss ddts ddtv dfds dfdt dfts dpdt dpsd dpst dpts dpvs dsdp dspf dsps dspt dssp dsst dsts dstv dsvd dtdp dtss dttp dvds dvfs fdst ffff ffps ffss fftf ffvs fpdt fptv fspf fssf fssp fstv ftps pdfs pdsd pdss pdtv pfff pfft pfps ppds pppd pppp ppps ppsf ppss ppts pptt pptv psdp psds psfs pspp psps psst psts pstv psvt ptpd ptsd pvfs pvts s-vt sdds sdps sdsf sdss sfpd sfss sftp sfts spdf spdp spdt spfs sppd sppf spps spsd spsp spss spst spts ssdd ssdf ssdp ssfp sspf ssps sspt sssf ssss sstd sstp ssts ssvp st-v stds stpd stpf stpp stps stsf stss sttd stvs tdff tdss tdtv tfpt tfsd tfss tftp tpdf tppd tppp tptp tsps tspt tssf tsst tsts ttff ttss tttt tvss tvtv vdtp vfts vsfs vvvv