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81 64 81 65 81 66 81 67 81 68 81 69 81 70 81 71 81 72 81 73 81 74 9725 9724 9723 9722 9721 9720 9719 9718 9717 9716

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