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87 44 87 45 87 46 87 47 87 48 87 49 87 50 87 51 87 52 87 53 87 54 6704 6703 6702 6701 6700 6699 6698 6697 6696 6695

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