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87 1 87 2 87 3 87 4 87 5 87 6 87 7 87 8 87 9 88 0 88 1 1912 1911 1910 1909 1908 1907 1906 1905 1904 1903

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