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54 6 54 7 54 8 54 9 55 0 55 1 55 2 55 3 55 4 55 5 55 6 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936

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