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48 4 48 5 48 6 48 7 48 8 48 9 49 0 49 1 49 2 49 3 49 4 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967

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