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12 77 12 78 12 79 12 80 12 81 12 82 12 83 12 84 12 85 12 86 12 87 4016 4015 4014 4013 4012 4011 4010 4009 4008 4007

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