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79 4 79 5 79 6 79 7 79 8 79 9 80 0 80 1 80 2 80 3 80 4 80 5 80 6 80 7 80 8 80 9 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928 1927 1926 1925 1924 1923

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