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25 8 25 9 26 0 26 1 26 2 26 3 26 4 26 5 26 6 26 7 26 8 26 9 27 0 27 1 27 2 27 3 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969

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