-up ddd ddi ddp dds ddt ddu ddy di- did dii dip dis dit diu diy dpd dpi dpp dps dpt dpu dsd dsi dsp dss dst dsu dsy dtd dti dtp dts dtt dtu dty dud dui dup dus dut duy dy- dyd dyp dys dyu dyy i-d idd idi idp ids idt idu idy iid iii iip iis iit iiu ipd ipi ipp ips ipt ipu ipy is- isd isi isp iss ist isu isy itd iti itp its itt itu ity iu- iud iui iup ius iut iys iyt iyy p-p pdd pdi pdp pds pdt pdu pid pii pip pis pit piu ppd ppi ppp pps ppt ppu ps- psd psi psp pss pst psu psy pt- ptd pti ptp pts ptt ptu pty pud pui pup pus put puu puy py- pyd pys pyt pyu sdd sdi sdp sds sdt sdu sdy sid sii sip sis sit siu spd spi spp sps spt spu spy ss- ssd ssi ssp sss sst ssu std sti stp sts stt stu sty sud sui sup sus sut suu suy sy- syd syi syp sys syt syu tdd tdi tdp tds tdt tdu tdy tid tii tip tis tit tiu tiy tpd tpi tpp tps tpt tpu tsd tsi tsp tss tst tsu tsy ttd tti ttp tts ttt ttu tty tud tui tup tus tut tuu tuy tyd typ tys tyt udd udi udp uds udt udu uid uii uip uis uit uiu up- upd upi upp ups upt upu usd usi usp uss ust usu utd uti utp uts utt utu uty uus uut uuu uyi uys uyu yds ydt ydy yid yii yip yis yit ypd yps ypu ysi ysp yss yst ysu ysy ytd ytp yts ytt ytu yud yui yup yus yut yuu yuy yys yyt yyu yyy