Each directory in this archive is named in the format 'nf-np' where nf
is the number of faces, and np the number of patches per face. Within
each directory are five optimal designs, named '0.dat' to '4.dat'.

In all cases there are np unique patch types (i.e., all patches are
distinct).

The format of each design file is as follows:
        - The first line has two numbers, which are the values of nf and
          np respectively.
        - The remaining lines define the patches.
        - The first np of these lines define the patches on face 1, the
          next np lines define the patches on face 2 and so on.
        - Each patch line gives the two-dimensional coordinates of the
          patch on a face in units of d, the edge length of a face,
          where the coordinate 0 0 corresponds to the centre of the
          face.
        - The order of patches on a face is significant as it
          corresponds to the colour of the patch, for example, the first
          patch on each face has the same colour.
