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81 3 81 4 81 5 81 6 81 7 81 8 81 9 82 0 82 1 82 2 82 3 2645 2644 2643 2642 2641 2640 2639 2638 2637 2636

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