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54 81 54 82 54 83 54 84 54 85 54 86 54 87 54 88 54 89 54 90 54 91 9840 9839 9838 9837 9836 9835 9834 9833 9832 9831

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