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54 9 55 0 55 1 55 2 55 3 55 4 55 5 55 6 55 7 55 8 55 9 56 0 56 1 56 2 56 3 56 4 56 5 56 6 56 7 56 8 56 9 57 0 57 1 871 870 869 868 867 866 865 864 863 862 861 860 859 858 857 856 855 854 853 852 851 850

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