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87 8 87 9 88 0 88 1 88 2 88 3 88 4 88 5 88 6 88 7 88 8 1480 1479 1478 1477 1476 1475 1474 1473 1472 1471

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