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12 0 12 1 12 2 12 3 12 4 12 5 12 6 12 7 12 8 12 9 13 0 13 1 13 2 13 3 13 4 13 5 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928 1927 1926 1925 1924 1923

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