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13 47 13 48 13 49 13 50 13 51 13 52 13 53 13 54 13 55 13 56 13 57 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964

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