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37 11 37 12 37 13 37 14 37 15 37 16 37 17 37 18 37 19 37 20 37 21 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977

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