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90 9 91 0 91 1 91 2 91 3 91 4 91 5 91 6 91 7 91 8 91 9 92 0 92 1 92 2 92 3 92 4 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936 1935

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