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77 9 78 0 78 1 78 2 78 3 78 4 78 5 78 6 78 7 78 8 78 9 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920

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