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15 94 15 95 15 96 15 97 15 98 15 99 16 00 16 01 16 02 16 03 16 04 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964

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