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56 8 56 9 57 0 57 1 57 2 57 3 57 4 57 5 57 6 57 7 57 8 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951

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