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73 21 73 22 73 23 73 24 73 25 73 26 73 27 73 28 73 29 73 30 73 31 36661 36660 36659 36658 36657 36656 36655 36654 36653 36652

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