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12 92 12 93 12 94 12 95 12 96 12 97 12 98 12 99 13 00 13 01 13 02 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972

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