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60 3 60 4 60 5 60 6 60 7 60 8 60 9 61 0 61 1 61 2 61 3 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928

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