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23 4 23 5 23 6 23 7 23 8 23 9 24 0 24 1 24 2 24 3 24 4 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978

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