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12 30 12 31 12 32 12 33 12 34 12 35 12 36 12 37 12 38 12 39 12 40 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951

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