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10 49 10 50 10 51 10 52 10 53 10 54 10 55 10 56 10 57 10 58 10 59 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966

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