public static void main(String[] args) {
TreeLinkNode e = new TreeLinkNode(1);
e.left = new TreeLinkNode(1);
e.right = new TreeLinkNode(2);
e.left.left = new TreeLinkNode(3);
e.left.right = new TreeLinkNode(4);
e.right.left = new TreeLinkNode(5);
e.right.right = new TreeLinkNode(6);
Solution s = new Solution();
s.connect(e);
s.printList(e.left);
s.printList(e.left.left);
}
public static void main(String[] args) {
Solution solution = new Solution();
Scanner scanner = new Scanner(System.in);
ListNode head1 = solution.buildList(scanner.nextLine());
ListNode head2 = solution.buildList(scanner.nextLine());
ListNode cur = head1;
while (cur != null && head2 != null) {
ListNode next1 = cur.next;
ListNode next2 = head2.next;
cur.next = head2;
head2.next = next1;
head2 = next2;
cur = next1;
}
solution.printList(head1);
solution.printList(head2);
scanner.close();
}