ddd dde ddi ddp dds ddt de- ded dee dei dep des det di- did die dii dip dis dit dpd dpe dpi dpp dps dpt dsd dse dsi dsp dss dst dtd dte dti dtp dts dtt ed- edd ede edi edp eds edt eed eee eep ees eet eid eie eii eip eis eit ep- epd epe epi epp eps ept es- esd ese esi esp ess est etd ete eti etp ets ett i-d idd ide idi idp ids idt ie- ied iee iei iep ies iet iid iie iii iip iis iit ipd ipe ipi ipp ips ipt is- isd ise isi isp iss ist itd ite iti itp its itt p-p pdd pde pdi pdp pds pdt ped pee pei pep pes pet pid pie pii pip pis pit ppd ppe ppi ppp pps ppt ps- psd pse psi psp pss pst pt- ptd pte pti ptp pts ptt sdd sde sdi sdp sds sdt se- sed see sei sep ses set sid sie sii sip sis sit spd spe spi spp sps spt ss- ssd sse ssi ssp sss sst std ste sti stp sts stt tdd tde tdi tdp tds tdt te- ted tee tei tep tes tet tid tie tii tip tis tit tpd tpe tpi tpp tps tpt tsd tse tsi tsp tss tst ttd tte tti ttp tts ttt