50
3
    6   13  -22   13  -20    7   23   21   16  -11  -10    1    7    7  -15
   19    5  -20    5    0  -17  -19   24  -11  -18    2   -8  -16  -22    4
  -16   13   -3  -14    2    1   17    5   -3   13   18   17  -11    5   -1
   -2   -1  -16    2  -21