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12 68 12 69 12 70 12 71 12 72 12 73 12 74 12 75 12 76 12 77 12 78 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891

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