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51 77 51 78 51 79 51 80 51 81 51 82 51 83 51 84 51 85 51 86 51 87 37513 37512 37511 37510 37509 37508 37507 37506 37505 37504

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