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15 02 15 03 15 04 15 05 15 06 15 07 15 08 15 09 15 10 15 11 15 12 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928

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