ddd dde ddi ddo ddx ddz de- ded dee dei deo dex dez di- did die dii dio dix diz dod doe doi doo dox doz dxd dxi dxo dxx dzd dze dzi dzo ed- edd ede edi edo edx eed eee eeo eex eid eie eii eio eix eo- eod eoe eoi eoo ex- exd exe exi exo exx eze ezo ezz i-d idd ide idi ido idx ie- ied iee iei iex iid iie iii iio iix io- iod ioe ioi ioo ixe ixi ize izi izo izz o-i odd ode odi odo oed oee oei oeo oex oid oie oii oio oiz oo- ood ooi ooo oox ox- oxi oxo oxx oze ozo ozz xde xdi xed xee xex xie xii xio xix xod xoi xoo xox xxi xxo xxx zed zee zeo zez zid zie zio zix ziz zo- zod zoe zoi zoo zox zxx zzx zzz