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87 52 87 53 87 54 87 55 87 56 87 57 87 58 87 59 87 60 87 61 87 62 6671 6670 6669 6668 6667 6666 6665 6664 6663 6662

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid