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17 0 17 1 17 2 17 3 17 4 17 5 17 6 17 7 17 8 17 9 18 0 18 1 18 2 18 3 18 4 18 5 18 6 18 7 18 8 18 9 19 0 19 1 19 2 1939 1938 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920 1919 1918

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