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12 65 12 66 12 67 12 68 12 69 12 70 12 71 12 72 12 73 12 74 12 75 12 76 12 77 12 78 12 79 12 80 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