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13 49 13 50 13 51 13 52 13 53 13 54 13 55 13 56 13 57 13 58 13 59 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968

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