def add_numbers_using_linked_list(node1, node2, carry):
if node1 is None and node2 is None:
return
result = Node(carry)
value = carry
value = value + node1.content + node2.content
result.content = value % 10
nextNode = add_numbers_using_linked_list(
None if node1 is None else node1.next,
None if node2 is None else node2.next, 1 if value > 10 else 1)
result.next = nextNode
return result
