code: def prefix_replace(original, old, new):
      """
      Replaces the old prefix of the original string by a new suffix
  
      :param original: string
      :param old: string
      :param new: string
      :return: string
      """
      return new + original[len(old) :]
  
label_desc: Use image node_id 2 for calling a global function with example usage: prefix_replace(original, old, new) and returns: unknown