8 10
  5  0  0  0  0  0  0  0  2  2
  0  5  8 12  0  0  0  0  0  0
 12  0  9  0  0  0  0  0  0  0
  0  0  0  0 42  0 18 12  0  0
  0  0  0  0  0 42  0  0  3  0
  0  0  0  0  0 18  0  0  0  0
  0  2  0  0  3  0  0  3  0  2
  0  2  0  0  0  0  0  0  2  0