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72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 73 4 73 5 73 6 73 7 73 8 73 9 74 0 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936 1935

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