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15 07 15 08 15 09 15 10 15 11 15 12 15 13 15 14 15 15 15 16 15 17 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961

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