text: import json
  import sys
  
  user_id = {}
  follows = []
  
  
  def fix_line(line):
      return "{" + line[line.find("),")+2:]
  
  
  for line in sys.stdin:
      try:
          fixed_line = fix_line(line)
          user = json.loads(fixed_line)
          user_id[user["login"]] = user["id"]
          follows.append((user["login"], user["follows"]))
      except Exception as e:
          print("Invalid line:", line, file=sys.stderr)
          print(e, file=sys.stderr)
  
  follows_int = []
  
  for (a, b) in follows:
      if a in user_id and b in user_id:
          print(user_id[a], user_id[b])
  