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21 2 21 3 21 4 21 5 21 6 21 7 21 8 21 9 22 0 22 1 22 2 22 3 22 4 22 5 22 6 22 7 1889 1888 1887 1886 1885 1884 1883 1882 1881 1880 1879 1878 1877 1876 1875

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