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31 2 31 3 31 4 31 5 31 6 31 7 31 8 31 9 32 0 32 1 32 2 1948 1947 1946 1945 1944 1943 1942 1941 1940 1939

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