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10 70 10 71 10 72 10 73 10 74 10 75 10 76 10 77 10 78 10 79 10 80 1901 1900 1899 1898 1897 1896 1895 1894 1893 1892

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