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31 2 31 3 31 4 31 5 31 6 31 7 31 8 31 9 32 0 32 1 32 2 32 3 32 4 32 5 32 6 32 7 1957 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943

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