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12 59 12 60 12 61 12 62 12 63 12 64 12 65 12 66 12 67 12 68 12 69 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967

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