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37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 3678 3677 3676 3675 3674 3673 3672 3671 3670 3669 3668 3667 3666 3665 3664

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