code: def suffix():
      """Generate a random string of length 4."""
      alph = "abcdefghijklmnopqrstuvwxyz"
      return "-".join(
          [
              time.strftime("%Y-%m-%d-%H%M%S"),
              "".join(random.sample(alph, 4)),
          ]
      )
  
imports: from __future__ import absolute_import
  import random
  import time
  from sagemaker.session import Session
label_desc: Use image node_id 1 for calling a global function with example usage: suffix() and returns: str