 On the other hand, we prove that rearrangement on 2D and higher dimensional lattices becomes computationally intractable to optimally solve.
<coherence>  On the other hand, we prove that rearrangement on 2D and higher dimensional lattices becomes computationally intractable to optimally solve.
 On the other hand, we show that rearrangement on 2D and higher dimensional lattices becomes computationally intractable to optimally solve.