20     -28
     -11      -4
     -17      21
     -12      32
      -9      27
     -14     -31
      29     -11
     -30     -17
      24      20
      21       7
     -32      30
       8     -22
       7     -26
     -26     -18
     -15      12
       5      23
      16     -16
      31       6
     -19      -2
      18     -15
     -27     -19
      -3     -10
      -1     -13
     -13      -5
      -6     -14
     -10     -29
      23     -24
       2       9
     -22     -25
      28      -1
      25      -8
       4       3