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18 87 18 88 18 89 18 90 18 91 18 92 18 93 18 94 18 95 18 96 18 97 18 98 18 99 19 00 19 01 19 02 1648 1647 1646 1645 1644 1643 1642 1641 1640 1639 1638 1637 1636 1635 1634

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