def test3(self):
node1 = ListNode(1)
node2 = ListNode(2)
node3 = ListNode(3)
node4 = ListNode(4)
node5 = ListNode(5)
node6 = ListNode(6)
node7 = ListNode(7)
node8 = ListNode(8)
node9 = ListNode(9)
node10 = ListNode(10)
node11 = ListNode(11)
node12 = ListNode(12)
node13 = ListNode(13)
node13 = ListNode(13)
node1.next = node2
node2.next = node3
node3.next = node4
node4.next = node5
node5.next = node6
node6.next = node1
node7.next = node8
node8.next = node9
node9.next = node10
node10.next = node11
node11.next = node12
node12.next = node13
node12.next = node7
s = Solution()
res = s.is_interset(node1, node7)
print res
self.assertFalse(res)
