1  2
  1.5  2
  2  2
  2.5  2
  3  2
  3.5  2
  4  2
  1  3
  1.5  3
  2  3
  2.5  3
  3  3
  3.5  3
  4  3
  1  4
  1.5  4
  2  4
  2.5  4
  3  4
  3.5  4
  4  4