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14 68 14 69 14 70 14 71 14 72 14 73 14 74 14 75 14 76 14 77 14 78 14 79 14 80 14 81 14 82 14 83 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977

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