#R
 11 -11
 10 -10
 12 -10
  9  -9
 12  -9
  8  -8
 12  -8
 13  -8
  7  -7
  6  -6
  5  -5
  4  -4
  3  -3
  2  -2
  1  -1
  0   0
 -1   1
 -2   2
 -3   3
 -4   4
 -5   5
 -6   6
 -7   7
 -8   8
 -9   9
-12  10
-11  10
-10  10
-11  11