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10 04 10 05 10 06 10 07 10 08 10 09 10 10 10 11 10 12 10 13 10 14 10 15 10 16 10 17 10 18 10 19 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943 1942

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