matrix field=25 rows=14 cols=14
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  3  4  4  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  1  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  1  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  0  1  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  0  1  0  0  0  0
  0  0  0  0  0  0  0  0  0  0  1  0  0  0
  2  3  1  0  4  0  0  1  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  0  0  0  0  1  0
 16  5 16  8 17  4 10  1 14 24 15  0 16  0
 22 12  8 18  6  8 24 12 12  9  7  0 18  0
 24  3 19 11 16 19  7  3  0  0 23  1  0  0
  1 12 15  2 10  4 11 17  0  4 19  0  1  0
  9  6  2 11 24  8  6 24 23 11 24  0  7  1