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91 8 91 9 92 0 92 1 92 2 92 3 92 4 92 5 92 6 92 7 92 8 92 9 93 0 93 1 93 2 93 3 1928 1927 1926 1925 1924 1923 1922 1921 1920 1919 1918 1917 1916 1915 1914

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