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10 15 10 16 10 17 10 18 10 19 10 20 10 21 10 22 10 23 10 24 10 25 1964 1963 1962 1961 1960 1959 1958 1957 1956 1955

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