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10 73 10 74 10 75 10 76 10 77 10 78 10 79 10 80 10 81 10 82 10 83 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928

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