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89 8 89 9 90 0 90 1 90 2 90 3 90 4 90 5 90 6 90 7 90 8 90 9 91 0 91 1 91 2 91 3 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943 1942 1941

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