2.4

#adds two numbers from linked list

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

class LinkedList:
    def __init__(self):
        self.head = None

    def push(self, new_data):
        new_node = Node(new_data)
        new_node.next = self.head
        self.head = new_node
        return new_node

    def printList(self):
        current = self.head
        while current:
            print(current.data)
            current = current.next

def addTwoLinkedList(a, b):
    l = LinkedList()
    while a.next:
        sum = a.data + b.data
        if sum > 10:
            l.push(sum % 10)
            a.next.data += 1
        else:
            l.push(sum)
        a = a.next
        b = b.next
    l.push(a.data + b.data)
    return l