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q:=p↑.link;p↑.link:=q↑.link p↑.link:=q↑.link;q↑link:=p↑.link q↑.link:=p;p↑.link:=q q↑.link:=P↑.link;p↑,link:=q
s↑.link:=p↑.link;p↑.link:=s q↑.link:=s;s↑.link:=p p↑.link:=s↑.link;s↑.link:=p p↑.link:=s;s↑.link:=q
s↑.link=p↑.link;p↑.link:=s q↑.link:=s;s↑link=p p↑.link:=s↑.link;s↑.link:=p P↑.link:=s;s↑.link:=q
q:=p↑.link;p↑.link:=q↑.link p↑.link:=q↑.link;q↑.link:=p↑.link q↑.link:=p;p↑.link:=q q↑.link:=p↑.link;p↑.link:=q
q:=p↑.link;p↑.link:=q↑.link p↑.link:=q↑.link;q↑.link:=p↑.link q↑.link:=p;p↑.link:=q q↑.linkl:=p↑.link;p↑.link:=q
s ->link=p->link;p->link=s q->link=s;s->link=p p->link=s->link;s->link=p p->link=s;s->link=q
q:=p↑.link; p↑.link:=q↑.link p↑.link=q↑.link; q↑.link:=p↑.link q↑.link=p; p↑.link=q q↑.link:=p↑.link; p↑.link:=q
p->next=q->next;q->next=p; q->next=p->next;p=q; p->next=q->next;p->next=q; q->next=>next;p->next=q;
s↑.link:=p↑.link;p↑.link:=s q↑.link:=s;s↑.link:=p p↑.link:=s↑.link;s↑.link:=p p↑.link:=s;s↑.link:=q
q:=p^.link;p^.link:=q^.link; p^.link:=q^.link;q:=p^.link; q^.link:=p^.link;q^.link:=q; p^.link:=q; q^.link:=p^.link;