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31 87 9 31 88 0 31 88 1 31 88 2 31 88 3 31 88 4 31 88 5 31 88 6 31 88 7 31 88 8 31 88 9 31 89 0 31 89 1 31 89 2 31 89 3 31 89 4 31 89 5 31 89 6 31 89 7 31 89 8 31 89 9 31 90 0 31 90 1 13890 13889 13888 13887 13886 13885 13884 13883 13882 13881 13880 13879 13878 13877 13876 13875 13874 13873 13872 13871 13870 13869

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