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12 57 12 58 12 59 12 60 12 61 12 62 12 63 12 64 12 65 12 66 12 67 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978

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