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10 82 10 83 10 84 10 85 10 86 10 87 10 88 10 89 10 90 10 91 10 92 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964

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