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17 81 17 82 17 83 17 84 17 85 17 86 17 87 17 88 17 89 17 90 17 91 1899 1898 1897 1896 1895 1894 1893 1892 1891 1890

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