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36 87 36 88 36 89 36 90 36 91 36 92 36 93 36 94 36 95 36 96 36 97 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972

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