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10 35 10 36 10 37 10 38 10 39 10 40 10 41 10 42 10 43 10 44 10 45 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980

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