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17 69 17 70 17 71 17 72 17 73 17 74 17 75 17 76 17 77 17 78 17 79 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951

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