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18 16 18 17 18 18 18 19 18 20 18 21 18 22 18 23 18 24 18 25 18 26 1965 1964 1963 1962 1961 1960 1959 1958 1957 1956

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