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77 42 77 43 77 44 77 45 77 46 77 47 77 48 77 49 77 50 77 51 77 52 7637 7636 7635 7634 7633 7632 7631 7630 7629 7628

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