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52 8 52 9 53 0 53 1 53 2 53 3 53 4 53 5 53 6 53 7 53 8 1440 1439 1438 1437 1436 1435 1434 1433 1432 1431

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