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41 4 41 5 41 6 41 7 41 8 41 9 42 0 42 1 42 2 42 3 42 4 42 5 42 6 42 7 42 8 42 9 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891 1890 1889 1888 1887 1886

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