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81 7 81 8 81 9 82 0 82 1 82 2 82 3 82 4 82 5 82 6 82 7 82 8 82 9 83 0 83 1 83 2 1943 1942 1941 1940 1939 1938 1937 1936 1935 1934 1933 1932 1931 1930 1929

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