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48 5 48 6 48 7 48 8 48 9 49 0 49 1 49 2 49 3 49 4 49 5 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920

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