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18 52 18 53 18 54 18 55 18 56 18 57 18 58 18 59 18 60 18 61 18 62 18 63 18 64 18 65 18 66 18 67 58637 58636 58635 58634 58633 58632 58631 58630 58629 58628 58627 58626 58625 58624 58623

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