LinkedListNode list3 = addLists(lA1, lB1, 0);
System.out.println(" " + lA1.printForward());
System.out.println("+ " + lB1.printForward());
System.out.println("= " + list3.printForward());
int l1 = linkedListToInt(lA1);
int l2 = linkedListToInt(lB1);
int l3 = linkedListToInt(list3);