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53 20 53 21 53 22 53 23 53 24 53 25 53 26 53 27 53 28 53 29 53 30 37407 37406 37405 37404 37403 37402 37401 37400 37399 37398

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