Rectangles: (7 entries)
  0: Rectangle: x1=0, y1=0, x2=55, y2=27
  1: Rectangle: x1=0, y1=28, x2=28, y2=51
  2: Rectangle: x1=29, y1=28, x2=55, y2=51
  3: Rectangle: x1=0, y1=52, x2=31, y2=73
  4: Rectangle: x1=32, y1=52, x2=55, y2=80
  5: Rectangle: x1=0, y1=74, x2=31, y2=108
  6: Rectangle: x1=32, y1=81, x2=55, y2=108