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53 3 53 4 53 5 53 6 53 7 53 8 53 9 54 0 54 1 54 2 54 3 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965

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