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48 1 48 2 48 3 48 4 48 5 48 6 48 7 48 8 48 9 49 0 49 1 1870 1869 1868 1867 1866 1865 1864 1863 1862 1861

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