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24 7 24 8 24 9 25 0 25 1 25 2 25 3 25 4 25 5 25 6 25 7 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966

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