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87 94 87 95 87 96 87 97 87 98 87 99 88 00 88 01 88 02 88 03 88 04 9109 9108 9107 9106 9105 9104 9103 9102 9101 9100

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