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19 5 19 6 19 7 19 8 19 9 20 0 20 1 20 2 20 3 20 4 20 5 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961

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