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54 7 54 8 54 9 55 0 55 1 55 2 55 3 55 4 55 5 55 6 55 7 1872 1871 1870 1869 1868 1867 1866 1865 1864 1863

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