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73 8 73 9 74 0 74 1 74 2 74 3 74 4 74 5 74 6 74 7 74 8 74 9 75 0 75 1 75 2 75 3 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897 1896 1895 1894 1893 1892

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