Below is a quasi difference matrix, QDM, over Z47 which gives 3
IMOILS(50,3)

Each column (a b c d e) below (except the first) generates 2 columns
in the QDM: (a b c d e) and (b a d c e).

   0   0   0  24  19  40  20  13   4  30  32  25  42  45 33 |\\
   0  11  10  41  26   2   5  38  12  18  36  23  16  14  9 |\\
   0  25  17  44  46  11  41  43  33  24  13  39  28  29 26 |\\
   0   8  18   0   1  37  16  23   2  34  27  15  20  38 21 |\\
   -   -   0   0   0   0   0   0   0   0   0   0   0   0  0 |\\


 44 46  27   1  31  34  37  15  17   -   -   - |\\
 39 43  28  35  11   6   8  21   3   7  29  22 |\\
 31  9  22  10  30  32  42   4  36   8  40   6 |\\
 35 45   7   3  12  19   -   -   -  14   5  25 |\\
  0  0   0   0   0   0   0   0   0   0   0   0 |\\