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13 71 13 72 13 73 13 74 13 75 13 76 13 77 13 78 13 79 13 80 13 81 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936

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