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66 3 66 4 66 5 66 6 66 7 66 8 66 9 67 0 67 1 67 2 67 3 1940 1939 1938 1937 1936 1935 1934 1933 1932 1931

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