head1 = ListNode(1) node2 = ListNode(4) node3 = ListNode(6) node4 = ListNode(8) node5 = ListNode(10) head1.next = node2 node2.next = node3 node3.next = node4 node4.next = node5 head2 = ListNode(2) node2 = ListNode(3) node3 = ListNode(5) node4 = ListNode(7) node5 = ListNode(9) head2.next = node2 node2.next = node3 node3.next = node4 node4.next = node5 res = merge_sorted_lists(head1, head2) #res.show() head1.show() print '\n' #head2.show()