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12 16 12 17 12 18 12 19 12 20 12 21 12 22 12 23 12 24 12 25 12 26 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951

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