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13 43 13 44 13 45 13 46 13 47 13 48 13 49 13 50 13 51 13 52 13 53 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979

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