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13 51 13 52 13 53 13 54 13 55 13 56 13 57 13 58 13 59 13 60 13 61 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920

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