code: def shared_prefix(*strings: str):
      for i in range(min(map(len, strings))):
          if len(set(map(operator.itemgetter(i), strings))) != 1:
              return strings[0][:i]
      return min(strings, key=len)
  
file_path: hivemind/tests/test_routing.py
imports: import heapq
  import operator
  import random
  from itertools import chain, zip_longest
  from hivemind.dht.routing import DHTID, RoutingTable
  from hivemind.utils.networking import LOCALHOST
label_desc: Use image node_id 6 for calling a global function with example usage: shared_prefix() and returns: min, strings