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63 9 64 0 64 1 64 2 64 3 64 4 64 5 64 6 64 7 64 8 64 9 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982

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