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87 47 87 48 87 49 87 50 87 51 87 52 87 53 87 54 87 55 87 56 87 57 9211 9210 9209 9208 9207 9206 9205 9204 9203 9202

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