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17 42 17 43 17 44 17 45 17 46 17 47 17 48 17 49 17 50 17 51 17 52 1969 1968 1967 1966 1965 1964 1963 1962 1961 1960

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