old_contents: # https://www.hackerrank.com/challenges/get-the-value-of-the-node-at-a-specific-position-from-the-tail/forum
  
  def GetNode(head, position):
      curr = head
      tail = head
      for i in range(position):
          tail = tail.next
      while tail.next is not None:
          curr = curr.next
          tail = tail.next
      return curr.data
new_contents: # https://www.hackerrank.com/challenges/get-the-value-of-the-node-at-a-specific-position-from-the-tail/
  
  def GetNode(head, position):
      curr = head
      tail = head
      for i in range(position):
          tail = tail.next
      while tail.next is not None:
          curr = curr.next
          tail = tail.next
      return curr.data
subject: fix link URL of the problem