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77 3 77 4 77 5 77 6 77 7 77 8 77 9 78 0 78 1 78 2 78 3 78 4 78 5 78 6 78 7 78 8 500 499 498 497 496 495 494 493 492 491 490 489 488 487 486

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