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77 40 77 41 77 42 77 43 77 44 77 45 77 46 77 47 77 48 77 49 77 50 7618 7617 7616 7615 7614 7613 7612 7611 7610 7609

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