text: # O(n) time | O(n) space
  class LinkedList:
      def __init__(self, value):
          self.value = value
          self.next = None
  
  def sumOfLinkedLists(linkedListOne, linkedListTwo):
      head = LinkedList(0)
      curr = head
      carry = 0
      while linkedListOne or linkedListTwo or carry != 0:
          if linkedListOne:
              carry += linkedListOne.value
              linkedListOne = linkedListOne.next
          if linkedListTwo:
              carry += linkedListTwo.value
              linkedListTwo = linkedListTwo.next
          node = LinkedList(carry % 10)
          curr.next = node
          curr = curr.next
          carry = carry // 10
      return head.next
  