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12 66 12 67 12 68 12 69 12 70 12 71 12 72 12 73 12 74 12 75 12 76 12 77 12 78 12 79 12 80 12 81 1888 1887 1886 1885 1884 1883 1882 1881 1880 1879 1878 1877 1876 1875 1874

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