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77 1 77 2 77 3 77 4 77 5 77 6 77 7 77 8 77 9 78 0 78 1 78 2 78 3 78 4 78 5 78 6 1921 1920 1919 1918 1917 1916 1915 1914 1913 1912 1911 1910 1909 1908 1907

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