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52 1 52 2 52 3 52 4 52 5 52 6 52 7 52 8 52 9 53 0 53 1 1902 1901 1900 1899 1898 1897 1896 1895 1894 1893

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