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77 56 77 57 77 58 77 59 77 60 77 61 77 62 77 63 77 64 77 65 77 66 7623 7622 7621 7620 7619 7618 7617 7616 7615 7614

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