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52 1 52 2 52 3 52 4 52 5 52 6 52 7 52 8 52 9 53 0 53 1 53 2 53 3 53 4 53 5 53 6 3876 3875 3874 3873 3872 3871 3870 3869 3868 3867 3866 3865 3864 3863 3862

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