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27 0 27 1 27 2 27 3 27 4 27 5 27 6 27 7 27 8 27 9 28 0 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891

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