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18 03 18 04 18 05 18 06 18 07 18 08 18 09 18 10 18 11 18 12 18 13 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940

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