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21 18 1 21 18 2 21 18 3 21 18 4 21 18 5 21 18 6 21 18 7 21 18 8 21 18 9 21 19 0 21 19 1 21 19 2 21 19 3 21 19 4 21 19 5 21 19 6 47491 47490 47489 47488 47487 47486 47485 47484 47483 47482 47481 47480 47479 47478 47477

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