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12 13 12 14 12 15 12 16 12 17 12 18 12 19 12 20 12 21 12 22 12 23 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943

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