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17 6 17 7 17 8 17 9 18 0 18 1 18 2 18 3 18 4 18 5 18 6 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940

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