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17 45 17 46 17 47 17 48 17 49 17 50 17 51 17 52 17 53 17 54 17 55 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963

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