According to the above analysis, it can be seen that the "right" side of pointer j is all even, while the small box in the lower right corner of the figure shows "the left side of pointer j is all even", which contradicts the previous text and the accompanying figure. I believe that it should still be the case that the "right" side of pointer j is all even. If my understanding is incorrect, please point it out! Thank you for the editor's continued maintenance of this project!