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79 9 80 0 80 1 80 2 80 3 80 4 80 5 80 6 80 7 80 8 80 9 81 0 81 1 81 2 81 3 81 4 495 494 493 492 491 490 489 488 487 486 485 484 483 482 481

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