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60 9 61 0 61 1 61 2 61 3 61 4 61 5 61 6 61 7 61 8 61 9 1941 1940 1939 1938 1937 1936 1935 1934 1933 1932

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