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39 9 40 0 40 1 40 2 40 3 40 4 40 5 40 6 40 7 40 8 40 9 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964

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