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51 56 5 51 56 6 51 56 7 51 56 8 51 56 9 51 57 0 51 57 1 51 57 2 51 57 3 51 57 4 51 57 5 17974 17973 17972 17971 17970 17969 17968 17967 17966 17965

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