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98 6 98 7 98 8 98 9 99 0 99 1 99 2 99 3 99 4 99 5 99 6 99 7 99 8 99 9 10 00 10 01 1881 1880 1879 1878 1877 1876 1875 1874 1873 1872 1871 1870 1869 1868 1867

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