ddd dde ddf ddi ddo ddt ddx de- ded dee def dei deo det dex dfd dfe dff dfi dfo dft dfx di- did die dif dii dio dit dix dod doe dof doi doo dot dox dtd dte dtf dti dto dtt dtx dxd dxi dxo dxt dxx ed- edd ede edf edi edo edt edx eed eee eef eeo eet eex ef- efd efe eff efi efo eft efx eid eie eif eii eio eit eix eo- eod eoe eof eoi eoo eot etd ete etf eti eto ett etx ex- exd exe exi exo ext exx fdd fde fdf fdi fdo fdt fdx fed fee fef fei feo fet fex ffd ffe fff ffi ffo fft ffx fid fie fif fii fit fix foe fof foi foo fot fox ftd fte ftf fti fto ftt ftx fxe fxi fxt fxx i-d i-f idd ide idf idi ido idt idx ie- ied iee ief iei iet iex ifd ife iff ifi ifo ift ifx iid iie iif iii iio iit iix io- iod ioe iof ioi ioo iot itd ite itf iti ito itt itx ixe ixi o-i odd ode odf odi odo odt oed oee oef oei oeo oet oex of- ofd ofe off ofi ofo oft ofx oid oie oif oii oio oit oo- ood oof ooi ooo oot oox ot- otd ote otf oti oto ott ox- oxf oxi oxo oxt oxx t-x tdd tde tdf tdi tdo tdt tdx te- ted tee tef tei teo tet tex tfd tfe tff tfi tfo tft tfx tid tie tif tii tio tit tix to- tod toe tof toi too tot tox ttd tte ttf tti tto ttt ttx txe txf txi txt xde xdf xdi xdt xed xee xet xex xfe xft xfx xie xii xio xit xix xod xof xoi xoo xot xox xtf xti xtx xxi xxo xxx