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13 39 13 40 13 41 13 42 13 43 13 44 13 45 13 46 13 47 13 48 13 49 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968

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