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12 43 12 44 12 45 12 46 12 47 12 48 12 49 12 50 12 51 12 52 12 53 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962

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