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50 1 50 2 50 3 50 4 50 5 50 6 50 7 50 8 50 9 51 0 51 1 51 2 51 3 51 4 51 5 51 6 1924 1923 1922 1921 1920 1919 1918 1917 1916 1915 1914 1913 1912 1911 1910

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