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39 3 39 4 39 5 39 6 39 7 39 8 39 9 40 0 40 1 40 2 40 3 40 4 40 5 40 6 40 7 40 8 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961 1960

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