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77 04 77 05 77 06 77 07 77 08 77 09 77 10 77 11 77 12 77 13 77 14 7725 7724 7723 7722 7721 7720 7719 7718 7717 7716

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