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31 02 31 03 31 04 31 05 31 06 31 07 31 08 31 09 31 10 31 11 31 12 31 13 31 14 31 15 31 16 31 17 58457 58456 58455 58454 58453 58452 58451 58450 58449 58448 58447 58446 58445 58444 58443

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