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77 47 77 48 77 49 77 50 77 51 77 52 77 53 77 54 77 55 77 56 77 57 7637 7636 7635 7634 7633 7632 7631 7630 7629 7628

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