-up ddd ddi ddp ddr dds ddt ddu di- did dii dip dir dis dit diu dpd dpi dpp dpr dps dpt dpu drd dri drp drr drs drt dru dsd dsi dsp dsr dss dst dsu dtd dti dtp dtr dts dtt dtu dud dui dup dur dus dut i-d idd idi idp idr ids idt idu iid iii iip iir iis iit iiu ipd ipi ipp ipr ips ipt ipu ir- ird iri irp irr irs irt iru is- isd isi isp isr iss ist isu itd iti itp its itt itu iu- iud iui iup iur ius iut p-p pdd pdi pdp pdr pds pdt pdu pid pii pip pir pis pit piu ppd ppi ppp ppr pps ppt ppu prd pri prp prr prs prt pru ps- psd psi psp psr pss pst psu pt- ptd pti ptp ptr pts ptt ptu pud pui pup pur pus put puu rdd rdi rdp rdr rds rdt rdu rid rii rip rir ris rit rpd rpi rpp rpr rps rpt rpu rrd rri rrp rrr rrs rrt rru rsd rsi rsp rsr rss rst rsu rtd rti rtp rtr rts rtt rtu rud rui rup rur rus rut ruu sdd sdi sdp sdr sds sdt sdu sid sii sip sir sis sit siu spd spi spp spr sps spt spu sr- srd sri srp srr srs srt ss- ssd ssi ssp ssr sss sst ssu std sti stp str sts stt stu sud sui sup sur sus sut suu tdd tdi tdp tdr tds tdt tdu tid tii tip tir tis tit tiu tpd tpi tpp tpr tps tpt tpu trd tri trp trr trs trt tru tsd tsi tsp tsr tss tst tsu ttd tti ttp ttr tts ttt ttu tud tui tup tur tus tut tuu udd udi udp udr uds udt udu uid uii uip uir uis uit uiu up- upd upi upp upr ups upt upu ur- urd uri urp urr urs urt uru usd usi usp usr uss ust usu utd uti utp utr uts utt utu uur uus uut uuu