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87 36 87 37 87 38 87 39 87 40 87 41 87 42 87 43 87 44 87 45 87 46 6694 6693 6692 6691 6690 6689 6688 6687 6686 6685

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