9
  -2  -7  -8 -20  18   1  10  10 -20
  -1  -7  -2 -10 -20  -8  -8   0 -20
   0   7   4 -20 -20  -9  -6 -14 -20
   3   0   3  16 -20   8  -4 -10  18
  6
 -14 -20 -11   8   1   6
 -19 -20  -8   3   7 -16
 -17 -20  12 -20 -16   0
  16  17  -7  -5  -1   1
  7
   3   2   6   7  19 -20 -20
  -5  -4 -10  -2 -20   0   6
   0  -3 -10 -11 -20  -1   1
   1   4   5   0 -20  10   4
  7
   0   7   3   6  10 -20   1
  -7 -20 -14   3 -20   8  -1
  -5 -20 -15 -20 -20  11   3
   7  10   9   1   9 -20  -4
  5
 -20   6  -1   4   4
  16 -20 -19  -6  -3
  -5   0   3  -6 -14
 -20   5   6   4   5