3    19     7     7
  0  1  0  0  0  0  0
  1  0  0  0  0  0  0
  0  0  0  1  0  0  0
  0  0  1  0  0  0  0
  0  0  0  0  0  1  0
  0  0  0  0  1  0  0
  7  7 17 17  7  7 18