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18 01 18 02 18 03 18 04 18 05 18 06 18 07 18 08 18 09 18 10 18 11 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928

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