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52 9 53 0 53 1 53 2 53 3 53 4 53 5 53 6 53 7 53 8 53 9 1899 1898 1897 1896 1895 1894 1893 1892 1891 1890

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