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87 28 87 29 87 30 87 31 87 32 87 33 87 34 87 35 87 36 87 37 87 38 6709 6708 6707 6706 6705 6704 6703 6702 6701 6700

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