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12 41 12 42 12 43 12 44 12 45 12 46 12 47 12 48 12 49 12 50 12 51 1958 1957 1956 1955 1954 1953 1952 1951 1950 1949

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