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18 97 18 98 18 99 19 00 19 01 19 02 19 03 19 04 19 05 19 06 19 07 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938

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