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17 41 17 42 17 43 17 44 17 45 17 46 17 47 17 48 17 49 17 50 17 51 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977

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