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18 33 18 34 18 35 18 36 18 37 18 38 18 39 18 40 18 41 18 42 18 43 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977

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