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10 87 10 88 10 89 10 90 10 91 10 92 10 93 10 94 10 95 10 96 10 97 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970

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