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72 0 72 1 72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947

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