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17 37 17 38 17 39 17 40 17 41 17 42 17 43 17 44 17 45 17 46 17 47 17 48 17 49 17 50 17 51 17 52 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980

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