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20 9 21 0 21 1 21 2 21 3 21 4 21 5 21 6 21 7 21 8 21 9 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943

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