-up ddd ddp ddr dds ddt ddu dpd dpp dpr dps dpt dpu drd drp drr drs drt dru dsd dsp dsr dss dst dsu dtd dtp dtr dts dtt dtu dud dup dur dus dut p-p pdd pdp pdr pds pdt pdu ppd ppp ppr pps ppt ppu prd prp prr prs prt pru ps- psd psp psr pss pst psu pt- ptd ptp ptr pts ptt ptu pud pup pur pus put puu rdd rdp rdr rds rdt rdu rpd rpp rpr rps rpt rpu rrd rrp rrr rrs rrt rru rsd rsp rsr rss rst rsu rtd rtp rtr rts rtt rtu rud rup rur rus rut ruu sdd sdp sdr sds sdt sdu spd spp spr sps spt spu sr- srd srp srr srs srt ss- ssd ssp ssr sss sst ssu std stp str sts stt stu sud sup sur sus sut suu tdd tdp tdr tds tdt tdu tpd tpp tpr tps tpt tpu trd trp trr trs trt tru tsd tsp tsr tss tst tsu ttd ttp ttr tts ttt ttu tud tup tur tus tut tuu udd udp udr uds udt udu up- upd upp upr ups upt upu ur- urd urp urr urs urt uru usd usp usr uss ust usu utd utp utr uts utt utu uur uus uut uuu