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81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936 1935 1934 1933

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