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21 87 21 88 21 89 21 90 21 91 21 92 21 93 21 94 21 95 21 96 21 97 3710 3709 3708 3707 3706 3705 3704 3703 3702 3701

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