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89 2 89 3 89 4 89 5 89 6 89 7 89 8 89 9 90 0 90 1 90 2 1870 1869 1868 1867 1866 1865 1864 1863 1862 1861

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