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17 86 17 87 17 88 17 89 17 90 17 91 17 92 17 93 17 94 17 95 17 96 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972

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