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80 2 80 3 80 4 80 5 80 6 80 7 80 8 80 9 81 0 81 1 81 2 1959 1958 1957 1956 1955 1954 1953 1952 1951 1950

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