Intersection of Two Linked Lists 1

The linked list L1 is  (1 -> 2 -> 3 -> 7 -> 8 -> 9 -> 4 -> 5 -> 6) having a length n and linked list L2 is (-1 -> -3 -> 9 -> 4 -> 5 -> 6) having a length m. So above both L1 and L2 are intersecting at ...