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12 51 12 52 12 53 12 54 12 55 12 56 12 57 12 58 12 59 12 60 12 61 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943

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