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40 9 41 0 41 1 41 2 41 3 41 4 41 5 41 6 41 7 41 8 41 9 1924 1923 1922 1921 1920 1919 1918 1917 1916 1915

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