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21 17 4 21 17 5 21 17 6 21 17 7 21 17 8 21 17 9 21 18 0 21 18 1 21 18 2 21 18 3 21 18 4 25474 25473 25472 25471 25470 25469 25468 25467 25466 25465

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