ddd dde ddf ddo ddp dds ddt de- ded dee def deo dep des det dfd dfe dff dfo dfp dfs dft dod doe dof doo dop dos dot dpd dpe dpf dpo dpp dps dpt dsd dse dsf dso dsp dss dst dtd dte dtf dto dtp dts dtt ed- edd ede edf edo edp eds edt eed eee eef eeo eep ees eet ef- efd efe eff efo efp efs eft eo- eod eoe eof eoo eop eos eot ep- epd epe epf epo epp eps ept es- esd ese esf eso esp ess est etd ete etf eto etp ets ett fdd fde fdf fdo fdp fds fdt fed fee fef feo fep fes fet ffd ffe fff ffo ffp ffs fft foe fof foo fop fos fot fpd fpe fpo fpp fps fpt fsd fse fsf fso fsp fss fst ftd fte ftf fto ftp fts ftt odd ode odf odo odp ods odt oed oee oef oeo oep oes oet of- ofd ofe off ofo ofp ofs oft oo- ood oof ooo oop oos oot op- opd ope opf opo opp ops opt os- osd ose osf oso osp oss ost ot- otd ote otf oto otp ots ott p-p pdd pde pdf pdo pdp pds pdt ped pee pef peo pep pes pet pfd pfe pff pfo pfp pfs pft pod poe pof poo pop pos pot ppd ppe ppf ppo ppp pps ppt ps- psd pse psf pso psp pss pst pt- ptd pte ptf pto ptp pts ptt sdd sde sdf sdo sdp sds sdt se- sed see sef seo sep ses set sfd sfe sff sfo sfp sfs sft sod soe sof soo sop sos sot spd spe spf spo spp sps spt ss- ssd sse ssf sso ssp sss sst std ste stf sto stp sts stt tdd tde tdf tdo tdp tds tdt te- ted tee tef teo tep tes tet tfd tfe tff tfo tfp tfs tft to- tod toe tof too top tos tot tpd tpe tpf tpo tpp tps tpt tsd tse tsf tso tsp tss tst ttd tte ttf tto ttp tts ttt