ddd dde ddf ddo ddp ddt de- ded dee def deo dep det dfd dfe dff dfo dfp dft dod doe dof doo dop dot dpd dpe dpf dpo dpp dpt dtd dte dtf dto dtp dtt ed- edd ede edf edo edp edt eed eee eef eeo eep eet ef- efd efe eff efo efp eft eo- eod eoe eof eoo eop eot ep- epd epe epf epo epp ept etd ete etf eto etp ett fdd fde fdf fdo fdp fdt fed fee fef feo fep fet ffd ffe fff ffo ffp fft foe fof foo fop fot fpd fpe fpo fpp fpt ftd fte ftf fto ftp ftt odd ode odf odo odp odt oed oee oef oeo oep oet of- ofd ofe off ofo ofp oft oo- ood oof ooo oop oot op- opd ope opf opo opp opt ot- otd ote otf oto otp ott p-p pdd pde pdf pdo pdp pdt ped pee pef peo pep pet pfd pfe pff pfo pfp pft pod poe pof poo pop pot ppd ppe ppf ppo ppp ppt pt- ptd pte ptf pto ptp ptt tdd tde tdf tdo tdp tdt te- ted tee tef teo tep tet tfd tfe tff tfo tfp tft to- tod toe tof too top tot tpd tpe tpf tpo tpp tpt ttd tte ttf tto ttp ttt