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71 8 71 9 72 0 72 1 72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 539 538 537 536 535 534 533 532 531 530 529 528 527 526 525

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